Manufacturer Model Year Serial Number Origin Type Length Material Duplex Case Box Problem Accession No. Location Scanned
A W Faber 1/87 Calculating Rule 1975 Germany Linear 25.0 Wood 0 1 0 0 MHF-403 MHF-D23 0
A W Faber 1/87 Calculating Rule 1975 Germany Linear 25.0 Wood 0 0 0 1 MHF-407 MHF-D23 0
A W Faber Pre-360 Decimal Tracker Cursor 1900 Germany Linear 25.0 Wood 0 0 0 1 MHF-405 MHF-D23 0
A W Faber Pre-364 1910 Germany Linear 25.0 Wood 0 0 0 0 MHF-406 MHF-D23 0
ACU-Math Manual Mannheim Type Slide Rule No. 44 0 USA Manual 0.0 Paper 0 0 0 0 MHF-753 MHF-D22 0
Acumath 400 Simplex Trig 1968 R F Leach USA Linear 25.0 Plastic 0 0 0 0 MHF-580 Display 0
Acumath 400B Simplex Trig 1965 USA Linear 25.0 Plastic 0 1 0 0 MHF-353 MHF-D22 0
Acumath 400T Simplex Trig 0 Germany Linear 25.0 Plastic 0 1 0 0 MHF-354 MHF-D22 0
Acumath 600 Basic Trig 1955 USA Linear 25.0 Wood 0 1 0 0 MHF-355 MHF-D22 0
Acumath Instructions for using Trig and Log Log Slide Rules 1965 USA Manual 0.0 Paper 0 0 0 0 MHF-621B MHF-D22 0
Acumath - Berger Scientific supplies C2141 1965 USA Linear 25.0 Plastic 0 0 0 0 MHF-622 MHF-D22 0
Acumath - Berger Scientific supplies C2165 Log Log Decimal Trig 1965 USA Linear 25.0 Plastic 1 1 1 0 MHF-621 MHF-D22 0
Aero Products Reasearch, Inc. E6-B2 Flight Computer 1978 No Value No Value 24.5 Metal 0 1 0 0 MHF-465 MHF-D25 0
Albert Nestler 14 Micronta 1952 Germany Linear 25.0 Plastic 0 1 0 0 MHF-402 MHF-D23 0
Albert Nestler 23R Rietz 0 Germany Linear 25.0 Wood 0 1 0 0 MHF-401 MHF-D23 0
Albert Nestler 24 Rietz 0 Germany Linear 50.0 Wood 0 1 0 0 MHF-624 MHF-D23 0
Albert Nestler A N 0 Germany Linear 12.5 Wood 0 1 0 0 MHF-400 MHF-D23 0
Albert Nestler Mannheim 1939 G. T. Pound Germany Linear 35.0 Wood 0 1 0 0 Sold Sold 0
American Adding Machine 5 0 55237 USA Adding Machine 0.0 Metal 0 0 0 0 MHF-769 Workshop 0
American Blueprint Co. Military Slide Rule 0 SA613 USA Linear 25.0 Wood 0 1 0 0 MHF-468 MHF-D25 0
American Blueprint Co. Military Slide Rule 0 USA Linear 25.0 Wood 0 1 0 0 MHF-469 MHF-D25 0
American Pattern Works Weight Slide Rule 0 USA Special 38.0 Wood 0 0 0 0 MHF-423 MHF-D24 0
American Radio Relay League, Inc. Ligthning Calculator Type A 1932 USA Special 18.5 Paper 0 0 0 0 MHF-521 MHF-D18 0
American Slide-Chart Corp. Axelson Factorule for Oil Wells 1980 USA Special 14.2 Plastic 0 1 0 0 MHF-432 MHF-D24 0
American Slide-Chart Corp. ENI Power Level Conversion Chart 1984 USA Special 15.0 Paper 0 0 0 0 MHF-631 MHF-D18 0
Amphenol Amphenol RF Calculator, Smith Chart 1969 USA Special 22.0 Plastic 0 0 0 0 MHF-520 MHF-D18 0
Amtronix, Inc. Caliputer 1965 USA Special 10.0 Metal 0 1 0 0 MHF-445 MHF-D24 0
Anson Am Inst Chem Eng 0 1-2012KG.F. USA Jewelry 4.5 Metal 0 0 0 0 MHF-639 MHF-Box1 0
Apec Products Corp. Magic Multiplying Pencil 0 USA Special 16.0 Wood 0 0 0 0 MHF-665 MHF-Box1 0
AREL G-W Photo Slide Rule 1946 USA Special 29.0 Wood 0 1 0 0 MHF-623 MHF-D25 0
Argonaut Associates Circular SLide Rule 0 USA Jewelry 4.0 Metal 0 0 1 0 MHF-792 MHF-Box1 0
Aristo 0968 Studio 1960 5938 Germany Linear 25.0 Plastic 1 1 0 0 MHF-583 Display 0
Aristo 0968 Studio 1960 604 Germany Linear 25.0 Plastic 1 1 0 0 MHF-415 MHF-D23 0
Aristo 0969 StudioLog 1973 2LS 9 Germany Linear 25.0 Plastic 1 1 0 0 MHF-416 MHF-D23 0
Aristo 10175 Electronic 0 Germany Linear 25.0 Plastic 0 1 0 0 MHF-414 MHF-D23 0
Aristo 868 Studio 1973 2LST10 Germany Linear 12.5 Plastic 1 1 1 0 MHF-411 MHF-D23 0
Aristo 869 Studiolog 1972 2LIT1 Germany Linear 12.5 Plastic 1 1 0 0 MHF-412 MHF-D23 0
Aristo 870 Multilog 1967 2FL08 Germany Linear 12.5 Plastic 1 1 1 0 MHF-413 MHF-D23 0
Aristo Charvoz 0970 MultiLog 1969 2FX21 Germany Linear 25.0 Plastic 1 1 0 0 MHF-418 MHF-D23 0
Aristo Charvoz 0970P MultiLog 1969 572 Germany Linear 25.0 Plastic 1 1 1 0 MHF-417 MHF-D23 0
Aristo Charvoz 0971 Aristo-Hyperbolog 1960 601 Germany Linear 25.0 Plastic 0 1 0 0 MHF-419 MHF-D23 0
Arithma Addiator 0 Germany Additator 16.0 Metal 0 0 0 0 MHF-475 MHF-D25 0
Arithma Addiator 0 Germany Additator 16.0 Metal 0 1 0 0 MHF-474 MHF-D25 0
Arithma Addiator 0 Germany Additator 16.0 Metal 0 0 0 0 MHF-476 MHF-D25 0
Armour and Company Retail Meat Pricer 1933 USA Special 22.5 Plastic 0 0 0 0 MHF-459 MHF-D24 0
Automatic Adding Machine CO Golden Gem 0 50857 USA Additator 13.0 Metal 0 0 0 1 MHF-532 MHF-D12 0
Automatic Adding Machine CO Golden Gem Model 16 0 102028 USA Additator 13.0 Metal 0 0 0 0 MHF-533 Cabinet 0
B. L. Makepeace 0 USA Jewelry 4.5 Metal 0 0 0 0 MHF-640 MHF-Box1 0
B. T. U. Rule Co. B. T. U. rule for Est. Steam or Water Rad. 1911 USA Linear 29.5 Wood 0 0 1 1 MHF-440 MHF-D24 0
Baron Buckles Engineer 1981 Taiwan Jewelry 7.0 Metal 0 0 0 0 MHF-641 MHF-Box1 0
Bastian Bros. Co JETS Lapel Pin 0 USA Jewelry 2.4 Metal 0 0 0 0 MHF-637 MHF-Box1 0
Bastian Bros.co JETS / Keuffel & Esser Lapel Pin 0 USA Jewelry 2.4 Metal 0 0 0 0 MHF-638 MHF-Box1 0
Belcher Bros & Co Shoe Fitting Ruler 1900 USA Special 39.0 Wood 0 0 0 0 MHF-272 MHF-D10 0
Bieker's Concrete Volume Computer 0 USA Special 16.0 Plastic 0 0 0 0 MHF-452 MHF-D24 0
Blundell Rules Limited P16-D 1956 PEM Gift UK Linear 12.5 Plastic 0 1 0 0 MHF-395 MHF-D23 0
Blundell Rules Limited Pilot Ballon Slide Rule, Mark IV 0 2768/56 UK Special 60.0 Plastic 0 0 1 0 MHF-489 MHF-D14 0
Boonshaft & Fuchs, Inc / Servo Calculator Company Direct Reading Frequency Response Slide Rule 1959 USA Special 35.0 Plastic 0 1 0 0 MHF-634 MHF-D13 0
Brady Publishing Company Slide Rule Problems Junior & Senior High School 1958 USA Manual 0.0 Paper 0 0 0 0 MHF-750 MHF-D19 0
Brevets Kaufman SDBG FR. Baby-Cine Posograph 0 France Special 12.0 Metal 0 1 0 0 MHF-547 Cabinet 1
Burroughs Adding Machine Company Burroughs Calcualtor, Class 5 0 USA Adding Machine 0.0 Metal 0 0 0 0 MHF-774 Rolltop 0
Burroughs Adding Machine Company Class 2 Adding Machine 1920 2-661759 USA Adding Machine 0.0 Metal 0 0 0 0 MHF-771 Workshop 0
Burroughs Adding Machine Company Manual of Instructions for Burroughs Calculator 1928 USA Manual 0.0 Hard Cover 0 0 0 0 MHF-775 Rolltop 0
C-Thru Ruler Company C-Thru Pocket Slide Rule NO. 27 0 USA Linear 14.8 Plastic 0 1 0 0 MHF-376 MHF-D20 0
Chadwick 1960 Japan Adding Machine 11.0 Plastic 0 0 0 0 MHF-768 Workshop 0
Charles Bruning Co. 2401 0 USA Linear 12.5 Plastic 0 1 0 0 MHF-358 MHF-D20 0
Charles Bruning Co. 2401 0 Smith... USA Linear 12.5 Plastic 0 1 0 0 MHF-356 MHF-D20 0
Charles Bruning Co. 2401 1944 USA Linear 12.5 Plastic 0 1 1 0 MHF-357 MHF-D20 0
Charles Bruning Co. 2420 Simplex 0 Ashok K USA Linear 25.0 Plastic 0 0 0 1 MHF-359 MHF-D20 0
Charles C. Ettien Speed & HP Estimator 1959 USA Special 10.8 Paper 0 0 0 0 MHF-515 MHF-D16 0
Charvoz-Roos PSR-102 1941 USA Linear 12.5 Wood 0 0 0 0 MHF-361 MHF-D20 0
Charvoz-Roos SR-109 0 USA Linear 25.0 Wood 0 0 0 0 MHF-579 Display 0
Charvoz-Roos SR-109 1941 GH USA Linear 25.0 Wood 1 1 0 0 MHF-362 MHF-D20 0
Charvoz-Roos SR-109 1946 LG USA Linear 25.0 Wood 1 1 0 0 MHF-360 MHF-D20 0
Chemical Rubber Publishing Co. Trigonograph 1934 USA Special 30.0 Plastic 0 1 0 0 MHF-667 MHF-D18 0
Concise 28N 0 Bermuda Tool & Die Japan Circular 6.5 Plastic 0 1 0 0 MHF-496 MHF-D16 0
Concise 28N Keyline 0 Magnetic Sheild Division Japan Circular 6.5 Plastic 0 1 0 0 MHF-497 MHF-D16 0
Contina AG Maureen Curta Calculator Type 1 1969 77450 Liechtenstien Additator 85.0 Metal 0 1 1 0 MHF-562 Cabinet 0
Contina Ltd Maureen Curta Calculator Type 2 1953 500869 Liechtenstien Additator 90.0 Metal 0 1 0 0 MHF-563 Cabinet 0
Contina Ltd Maureen Curta Calculator Type 2 1964 526792 Liechtenstien Additator 90.0 Metal 0 1 0 0 MHF-563 Cabinet 0
Continential Motors Corporation Motor Performance 0 USA Special 0.0 Plastic 0 1 0 0 MHF-451 MHF-D24 0
Corona Star Renown Star Lighter 0 Japan Jewelry 3.0 Wood 0 0 1 0 MHF-642 MHF-Box1 0
Cox & Stevens C-130B Load Adjuster 0 2301-1680-565-7735 USA Special 25.0 Plastic 0 1 0 0 MHF-466 MHF-D25 0
Creative Workshop Universal Circle Metric Converter 1970 Hong Kong Cylindrical 7.0 Plastic 0 0 1 0 MHF-767 Top Flat Files 0
Creative Workshop Universal Circle Metric Converter 1977 Hong Kong Cylindrical 7.0 Plastic 0 0 0 0 MHF-561 Cabinet 0
Creative Workshop Universal Circle Slide Rule 1970 Denmark Cylindrical 7.0 Plastic 0 0 0 0 MHF-560 Cabinet 0
Crosby Steam Gauge & Valve Co Steam Gauge 0 6432D USA Other 0.0 Metal 0 1 0 0 MHF-778 Bookcase-2 0
Crown Paper Board Co., Inc Paper Box Board Rule 0 USA Linear 15.7 Plastic 0 0 1 0 MHF-425 MHF-D24 0
Cubic Calculator Company HC Cube Master 1964 USA Special 20.0 Plastic 0 0 0 0 MHF-518 MHF-D18 0
D. HedBerg Graphic Chemical Predictor 1958 USA Special 20.5 Plastic 0 0 0 0 MHF-522 MHF-D18 0
DAL Executive Slide Rule Problem Solver 1963 USA Special 25.5 Wood 0 0 1 0 MHF-379 MHF-D20 0
Danfoss Refrigerant Slide RT.0X.A5.00 0 Denmark Linear 0.0 Plastic 0 0 0 0 MHF-447 MHF-D24 0
Datarule Publishing Co. Datarule Model B 1950 Samuel Heller USA Linear 21.0 Plastic 0 1 0 0 MHF-431 MHF-D24 0
Dennert & Pape Hazen-Williams Hydraulic 1923 D.R.P.No126499 Germany Special 25.0 Wood 0 1 0 0 MHF-435 MHF-D24 0
Devco Slide Pen Cyl Model 20 0 USA Jewelry 10.0 Plastic 0 0 0 0 MHF-643 MHF-Box1 0
Dietzgen 1734 Microglide Decimal Trig Log Log 1970 031310 USA Linear 25.0 Wood 1 1 0 0 MHF-366 MHF-D20 0
Dietzgen 1735 Maniphase Log Log Vector 1952 107274 USA Linear 25.0 Wood 1 1 0 0 MHF-367 MHF-D20 0
Dietzgen 1738 Multiphase Style-M 1954 Germany Linear 25.0 Metal 1 1 0 0 MHF-791 MHF-D20 0
Dietzgen 1739-L Clear-Scale 1954 Germany Linear 25.0 Plastic 0 1 0 0 MHF-399 MHF-D20 0
Dietzgen 1759-B Closed Simplex 1927 USA Linear 25.0 Wood 0 0 0 0 MHF-363 MHF-D20 0
Dietzgen 1767P National 1952 USA Linear 25.0 Wood 0 0 0 1 MHF-364 MHF-D20 0
Dietzgen 1768P Reliance 1940 USA Linear 25.0 Wood 0 0 0 1 ISRM ISRM 0
Dietzgen 1773 Log-Log 1962 1262 USA Linear 12.5 Plastic 0 1 1 0 MHF-368 MHF-D20 0
Dietzgen B-1725 Vector Type Log Log 1965 Japan Linear 25.0 Wood 1 1 0 0 MHF-365 MHF-D20 0
Dietzgen N1733 Polymath Decimal Trig Log Log 1959 8343 USA Linear 25.0 Wood 1 1 1 0 MHF-582 Display 0
Dietzgen Manual Decimal Trig Log Log Slide Rule 1959 1786, P-415 USA Manual 0.0 Paper 0 0 0 0 MHF-698 MHF-D20 0
Dietzgen Manual Maniphase Slide Rule 0 AM/1767/ISB USA Manual 0.0 Paper 0 0 0 0 MHF-700 MHF-D20 0
Dietzgen Manual Slide Rule No 1774 System Darmstadt Instructions 0 USA Manual 0.0 Paper 0 0 0 0 MHF-701 MHF-D20 0
Dilts Paper Stock Horsepower and Volume Calculator 0 USA Special 0.0 Paper 0 0 0 0 MHF-427 MHF-D24 0
Diwa 611-1 Electro Pocket 0 Denmark Linear 12.5 Plastic 0 1 0 0 MHF-626 MHF-D23 0
E. S. A. Ltd Holborn Viaduct Harrow Mark Reducer 0 UK Special 55.9 Wood 0 0 0 0 MHF-486 MHF-D25 1
E. W. Hiltpold Hiltpold Slide Rule 1947 + Pat 227376 Switzerland Circular 10.0 Plastic 0 1 0 0 MHF-614 Cabinet 0
E.TATA Beginner's Slide Rule 555 0 Japan Linear 25.0 Wood 0 1 0 0 MHF-390 MHF-D23 0
Eco Bra 1260 All-Aluminum 0 Germany Linear 12.5 Metal 0 1 0 0 MHF-795 MHF-D23 0
Eco Bra 1461 Syst. Reitz - Pinturas Vencedor 0 Germany Linear 12.5 Metal 1 1 0 0 MHF-793 MHF-D23 0
Edmund Scientific Co. Edmund S.N. 40,752 Chemical Predictor 0 602533-1 USA Special 27.7 Plastic 0 0 0 0 MHF-630 MHF-D18 0
Engineering Instruments 10-B? 1959 USA Linear 25.0 Wood 0 0 0 0 MHF-334 MHF-D22 0
Engineering Instruments 10B Deluxe 1967 USA Linear 25.0 Wood 0 0 1 0 MHF-335 MHF-D22 0
Engineering Instruments Code Maker 0 USA Special 18.0 Wood 0 0 1 0 MHF-341 MHF-D22 0
Engineering Instruments The Quick and Easy Slide Rule Instruction Book 0 USA Manual 0.0 Paper 0 0 0 0 MHF-340C MHF-D22 0
F C Farmar Farmar's Rule 1920 UK Special 42.2 Wood 1 0 0 0 MHF-456 MHF-D25 0
Faber Castell 111/87A Addiator Rietz 1957 57 11 Germany Linear 25.0 Plastic 0 0 0 0 MHF-404 MHF-D23 0
Faber Castell 2/83N Novo-Biplex 1962 Germany Linear 25.0 Plastic 1 1 0 0 MHF-410 MHF-D23 0
Faber Castell 62/83N Novo-Duplex 1974 Germany Linear 12.5 Plastic 1 1 1 0 MHF-409 MHF-D23 0
Faber Castell 8/10 1975 Germany Circular 12.5 Plastic 0 1 0 0 MHF-620 MHF-D23 0
Fearns Calculators Inertia Calculator for Rotating Masses 0 UK Special 19.1 Plastic 0 1 0 0 MHF-527 MHF-D18 0
Felt & Terrant Mfg. Co. Comptometer 1920 USA Adding Machine 0.0 Metal 0 0 0 0 MHF-772 Workshop 0
Feutron Feuchte-Rechenstab - typ 1802 0 Germany Linear 27.0 Plastic 1 0 1 0 MHF-441 MHF-D24 0
Firth Sterling Steel & Carbide Corp. Wire Drafting Calculator 1951 USA Circular 11.0 Plastic 0 1 0 0 MHF-618 MHF-D16 0
Fowler Universal Calculator 1950 UK Circular 7.5 Metal 0 1 0 1 MHF-494 MHF-D16 0
Fowler Universal Calculator 1950 UK Circular 7.5 Metal 0 1 0 0 MHF-806 MHF-D16 0
Foxboro Company Pub 19, Valve & Meter SR 1962 USA Special 13.5 Plastic 0 1 0 0 MHF-434 MHF-D24 0
Foxboro Company Pub 19, Valve & Meter SR 1971 USA Special 13.5 Plastic 0 1 0 0 MHF-433 MHF-D24 0
Fredrick Post Co. 1441 1951 BL Japan Linear 10.1 Wood 0 1 0 0 MHF-381 MHF-D23 0
Fredrick Post Co. 1444K 1951 Japan Linear 12.5 Wood 0 1 0 0 MHF-383 MHF-D23 0
Fredrick Post Co. 1446 0 Japan Linear 25.0 Wood 0 1 0 1 MHF-384 MHF-D23 0
Fredrick Post Co. 1460 Versalog 0 004557 Japan Linear 25.0 Wood 1 1 0 1 MHF-812 MHF-D23 0
Fredrick Post Co. 1462 0 Japan Linear 25.0 Wood 1 1 1 1 MHF-613 MHF-D23 0
Fredrick Post Co. How to operate your Post Slide Rule 0 USA Manual 0.0 Paper 0 0 0 0 MHF-815 MHF-D19 0
Fuji 551 RCA 0 Japan Linear 12.5 Plastic 1 1 1 0 MHF-391 MHF-D23 0
G. Felsenthal & Sonc, Inc. FAA-46C Computer, Air Navigation 0 AF5916761 USA Special 28.2 Metal 0 1 0 0 MHF-464 MHF-D25 0
Geo. W. Richardson 1776 Polymetric with CI 1912 USA Linear 25.0 Metal 0 1 0 0 MHF-350 MHF-D22 0
Geo. W. Richardson 1776 Simplex 1912 USA Linear 25.0 Metal 0 1 0 0 MHF-351 MHF-D22 0
Geo. W. Richardson 1776 Simplex 1912 USA Linear 25.0 Metal 0 1 0 1 MHF-348 MHF-D22 0
Geo. W. Richardson 1812 Pantocrat Mannheim 1912 Technical Supply Co. USA Linear 25.0 Metal 0 0 0 0 MHF-349 MHF-D22 0
Geo. W. Richardson 1917 Military 0 USA Linear 43.4 Metal 0 0 0 0 MHF-352 MHF-D22 0
Geo. W. Richardson 812 Pantocrat Slide Rule 1912 USA Linear 25.0 Metal 0 0 0 0 MHF-346 MHF-D22 0
Geo. W. Richardson 812 Pantocrat Slide Rule 1912 USA Linear 25.0 Metal 0 0 1 0 MHF-347 MHF-D22 0
Geo. W. Richardson Pantocrat Slide Rule 1911 USA Linear 25.0 Metal 0 0 0 0 MHF-345 MHF-D22 0
Geo. W. Richardson Pantocrat Slide Rule - 4 Slides 1911 USA Linear 25.0 Metal 0 0 0 0 MHF-816 MHF-D22 0
Geo. W. Richardson The Slide Rule Simplifed 1918 USA Manual 0.0 Paper 0 0 0 0 MHF-688 MHF-D22 0
Gerber Scientific Instrument Co. GA-103 Gerber Graphanalogue 0 USA Special 23.5 Metal 0 1 0 0 MHF-801 MHF-D14 0
Gerber Scientific Instrument Co. TP-007100 Variable Scale 0 USA Special 23.0 Metal 0 1 0 0 MHF-481 MHF-D14 0
Gerber Scientific Instrument Co. TP007200B Variable Scale 0 USA Special 50.0 Metal 0 1 0 0 MHF-480 MHF-D14 0
Gilson Atlas I Calculator 1922 USA Circular 24.5 Metal 0 1 0 0 MHF-501 MHF-D17 1
Gilson Atlas II - Binary 1949 William W. Correll USA Circular 20.0 Metal 1 1 0 0 MHF-502 MHF-D17 1
Gilson Atlas II Calculator 1931 USA Circular 20.0 Metal 0 0 0 0 MHF-540 Display 1
Gilson Binary 1931 Thomas D.Pease USA Circular 20.0 Metal 0 1 0 0 MHF-504 MHF-D17 1
Gilson Binary 1972 MHF USA Circular 20.0 Metal 0 1 0 0 MHF-541 Display 1
Gilson Midget 1919 USA Circular 10.0 Metal 0 0 0 0 MHF-505 MHF-D17 1
Gilson Midget 1931 USA Circular 9.5 Metal 0 0 0 0 MHF-506 MHF-D17 1
Gilson Midget 1960 USA Circular 10.0 Metal 0 0 0 0 MHF-805 MHF-D17 0
Gilson - Dietzgen Atlas Slide Rule 1931 USA Circular 20.0 Metal 0 1 0 0 MHF-785 MHF-D17 0
Gilson - Fredrick Post Atlas III Slide Rule 1931 USA Circular 20.0 Metal 0 1 0 0 MHF-503 MHF-D17 1
Gisholt Machine Co. Gisholt Time Computer 1933 USA Special 26.0 Metal 0 1 0 0 MHF-814 MHF-D25 0
Globemaster 62200 plastic slide rule 0 Japan No Value 12.5 Plastic 0 1 0 0 MHF-392 MHF-D23 0
GUCO 8200 Concrete Estimator 0 USA Special 18.5 Plastic 0 0 0 0 MHF-454 MHF-D24 0
Guedon 5” Metal 0 USA Linear 12.5 Metal 0 0 0 0 MHF-794 MHF-D23 0
H C Calculigraphe Calculigraphe Boucher 1900 France Circular 4.5 Metal 1 0 0 0 MHF-267 Cabinet 0
Handmade Head Depth 0 Handmade USA Special 20.6 Metal 0 0 0 0 MHF-444 MHF-D24 0
Handmade Upset Ratio 0 Handmade USA Special 20.8 Metal 0 0 0 0 MHF-443 MHF-D24 0
Hemmi 257 Chemical 1956 G E Japan Linear 25.0 Wood 1 1 0 0 MHF-608 MHF-D23 0
Hemmi 257 Chemical 1965 P K Japan Linear 25.0 Wood 1 1 0 0 MHF-609 MHF-D23 0
Hemmi 2664 0 Japan Linear 25.0 Plastic 0 1 0 0 MHF-610 MHF-D23 0
Hemmi 34RK Toshiba - Tokyo Shibaura Electric Co., Ltd. 1960 Japan Linear 12.5 Wood 0 1 0 0 MHF-382 MHF-D23 0
Hemmi 40RK 1969 Japan Linear 25.0 Wood 0 1 0 0 MHF-385 MHF-D23 0
Hemmi An Instruction Manual for Hemmi Slide Rules P280 and P281 0 7004T0 Japan Manual 0.0 Paper 0 0 0 0 MHF-697 MHF-D23 0
Hemmi / Ahrend Algemene Handleiding Voortrekker Rekenlinialen P281 1969 Dat1380/5/Q Germany Manual 0.0 Paper 0 0 0 0 MHF-696 MHF-D23 0
Hemmi / Ahrend P281 1969 Date Code TL Japan Linear 25.0 Plastic 0 1 0 0 MHF-386 MHF-D23 0
Hemmi / Fredrick Post Co. 1447 1951 Japan Linear 25.0 Wood 0 0 1 0 MHF-577 Display 0
Hemmi / Fredrick Post Co. 1447P 1965 Japan Linear 25.0 Plastic 0 1 0 0 MHF-611 MHF-D23 0
Hemmi / Teledyne Post 44CA-600 Versalog II 0 WG Japan Linear 25.0 Wood 1 1 0 0 MHF-387 MHF-D23 0
Henry W. Tomlinson, A.I.A. The Winslow Strength Computing Slide-Rule 1932 USA Special 26.0 Paper 0 0 1 0 MHF-629 MHF-D24 0
Hoffman Airplane Designer 1921 458 USA Special 15.0 Paper 0 0 0 0 MHF-495 Cabinet 1
Hoffman Products Short Directions for Use of the 10- and 5 inches UTO Slide Rules 0 2 copies USA Manual 0.0 Paper 0 0 0 0 MHF-752 MHF-D19 0
Ingersoll-Rand Co. Cox's Compressed-Air Discharge Computer 1900 USA Special 11.0 Paper 0 0 0 0 MHF-490 MHF-D16 1
Inst of Meteorology U of Chicago Horizon Temp & Press Gradient Scale 1943 John C. Bellamy USA Special 22.0 Paper 0 0 0 0 MHF-543 MHF-D16 1
Inst of Meteorology U of Chicago Pressure-Height Slide Rule 1943 John C. Bellamy USA Special 37.5 Wood 0 0 0 0 MHF-542 Shop Wall 1
IWA De Muiderkring N. V. IWA-TRONIC 0272 1963 Germany Linear 20.0 Plastic 0 1 0 0 MHF-430 MHF-D24 0
J. Amsler / B. K. Elliott Co 1920 56442 No Value Planimeter 0.0 No Value 0 0 1 0 MHF-482 MHF-D14 0
J. Halden & Co., Ltd. Halden Calculex 1925 UK Circular 6.0 Metal 0 1 0 0 MHF-268 Cabinet 0
J. Halden & Co., Ltd. Halden Calculex 1925 UK Circular 6.0 Metal 0 1 0 0 MHF-786 Cabinet 0
J. M. Spitzglass Spitzglass Slide Rule and Flow Computer 1918 USA Special 25.0 Plastic 0 1 0 0 MHF-436 MHF-D24 0
James Farrow & Son Pilot Ballon Slide Rule, Mark IV 0 2652/53 UK Special 60.0 Plastic 0 0 1 0 MHF-487 MHF-D14 0
Jones Metabolism Equipment Co, Metabolic Rate SLide Rule 0 USA Special 27.5 Metal 0 1 0 0 MHF-813 MHF-D25 0
Kesling Pocket Adder Company Kes-Add Pocket Adder 1950 USA Addometer 12.5 Plastic 0 1 0 1 MHF-472 MHF-D25 0
Keuffel & Esser 1744B Wm Cox Duplex, Dual Slide Chissel Point 1900 9 side Germany Linear 25.0 Wood 1 1 0 0 MHF-114 Cabinet 1
Keuffel & Esser 4010 Stima Addiator 1952 29577 Switzerland Additator 0.0 Metal 0 0 0 1 MHF-271 Cabinet 1
Keuffel & Esser 4012 Thacher’s Calculating Instrument 0 3980 UK Special 46.0 Wood 0 0 1 0 MHF-668 Top Flat Files 0
Keuffel & Esser 4017 Sperry's Pocket Calculator 1941 S714 USA Circular 4.3 Metal 0 0 0 0 MHF-266 Cabinet 0
Keuffel & Esser 4031 Mannheim 1923 193 end USA Linear 12.5 Wood 0 1 0 0 MHF-006 MHF-D1 1
Keuffel & Esser 4031 Mannheim 1924 92607 USA Linear 12.5 Wood 0 1 0 0 MHF-007 MHF-D1 1
Keuffel & Esser 4031 Mannheim 1924 95490 USA Linear 12.5 Wood 0 0 0 0 MHF-008 MHF-D1 1
Keuffel & Esser 4031 Mannheim 1925 97196 USA Linear 12.5 Wood 0 1 0 0 MHF-009 Cabinet 1
Keuffel & Esser 4031F Mannheim 1912 34 end USA Linear 12.5 Wood 0 1 0 0 MHF-003 Cabinet 1
Keuffel & Esser 4031F Mannheim 1915 541 end USA Linear 12.5 Wood 0 1 0 0 MHF-004 MHF-D1 1
Keuffel & Esser 4031F Mannheim 1915 32 end USA Linear 12.5 Wood 0 1 0 0 MHF-005 MHF-D1 1
Keuffel & Esser 4032 Mannheim (Chisel Point Magnifier) 1900 2 72 end USA Linear 12.5 Wood 0 1 0 0 MHF-001 Cabinet 1
Keuffel & Esser 4032 Mannheim (Magnifier) 1906 45 end USA Linear 12.5 Wood 0 0 0 0 MHF-002 Cabinet 1
Keuffel & Esser 4035 Mannheim 1915 395 end USA Linear 20.0 Wood 0 1 0 0 MHF-790 MHF-D1 1
Keuffel & Esser 4035 Mannheim 1915 30 end USA Linear 20.0 Wood 0 1 0 0 MHF-010 MHF-D1 1
Keuffel & Esser 4035 Mannheim 1915 451 end USA Linear 20.0 Wood 0 1 0 0 MHF-011 MHF-D1 1
Keuffel & Esser 4035 Mannheim Dual-line Cursor 1909 106+ end USA Linear 20.0 Wood 0 1 0 1 MHF-596 MHF-D1 1
Keuffel & Esser 4041 Mannheim 1914 606 end USA Linear 25.0 Wood 0 0 0 1 MHF-595 MHF-D1 1
Keuffel & Esser 4041 Mannheim 1914 217 end USA Linear 25.0 Wood 0 1 0 0 MHF-014 MHF-D1 1
Keuffel & Esser 4041 Mannheim 1914 3 end USA Linear 25.0 Wood 0 1 0 0 MHF-015 MHF-D1 1
Keuffel & Esser 4041 Mannheim 1914 280 end USA Linear 25.0 Wood 0 1 0 0 MHF-013 MHF-D1 1
Keuffel & Esser 4041 Mannheim 1928 196998 T C Lewis USA Linear 25.0 Wood 0 1 0 0 MHF-539 Rolltop 1
Keuffel & Esser 4041 Mannheim (Metal Cursor) 1915 53 end USA Linear 25.0 Wood 0 1 0 0 MHF-016 MHF-D1 1
Keuffel & Esser 4041F Mannheim 1914 610 end USA Linear 25.0 Wood 0 1 0 0 MHF-012 MHF-D1 1
Keuffel & Esser 4045 Mannheim 1922 35 End USA Linear 40.0 Wood 0 0 0 1 MHF-040 MHF-D11 1
Keuffel & Esser 4045 Mannheim 1922 26 End USA Linear 40.0 Wood 0 0 0 1 MHF-041 MHF-D11 1
Keuffel & Esser 4045 Mannheim 1922 31 end USA Linear 40.0 Wood 0 0 0 0 MHF-545 MHF-D11 1
Keuffel & Esser 4045 Mannheim 1922 85 End USA Linear 40.0 Wood 0 0 0 0 MHF-042 MHF-D11 1
Keuffel & Esser 4051 Mannheim 1909 22 end USA Linear 50.0 Wood 0 1 0 1 MHF-047 MHF-D11 0
Keuffel & Esser 4051 Mannheim 1914 195 end USA Linear 50.0 Wood 0 1 0 0 MHF-044 MHF-D11 0
Keuffel & Esser 4051 Mannheim 1914 198 end USA Linear 50.0 Wood 0 0 0 0 MHF-043 MHF-D11 0
Keuffel & Esser 4051 Mannheim 1922 54 end USA Linear 50.0 Wood 0 1 0 1 MHF-045 MHF-D11 0
Keuffel & Esser 4051 Mannheim 1922 5 end USA Linear 50.0 Wood 0 1 0 0 MHF-046 MHF-D11 0
Keuffel & Esser 4053 Polyphase Mannheim 1909 86X end USA Linear 25.0 Wood 0 1 0 0 MHF-052 MHF-D1 1
Keuffel & Esser 4053 Polyphase Mannheim 1910 571 end USA Linear 25.0 Wood 0 0 0 0 MHF-051 MHF-D2 1
Keuffel & Esser 4053-2 Polyphase Mannheim 1914 959 end - Conrad Shure USA Linear 20.0 Wood 0 1 0 0 MHF-597 MHF-D2 1
Keuffel & Esser 4053-2 Polyphase Mannheim 1914 60 end USA Linear 20.0 Wood 0 1 0 0 MHF-048 MHF-D2 1
Keuffel & Esser 4053-2 Polyphase Mannheim 1922 11 end USA Linear 20.0 Wood 0 1 0 0 MHF-049 MHF-D2 1
Keuffel & Esser 4053-3 Polyphase Mannheim 1912 794 end USA Linear 25.0 Wood 0 1 0 0 MHF-053 MHF-D2 1
Keuffel & Esser 4053-3 Polyphase Mannheim 1913 106x end, Ed Chamberlian USA Linear 25.0 Wood 0 1 0 0 MHF-054 MHF-D2 1
Keuffel & Esser 4053-3 Polyphase Mannheim 1921 317 X end & 12 end USA Linear 25.0 Wood 0 1 0 0 MHF-056 MHF-D2 1
Keuffel & Esser 4053-3 Polyphase Mannheim 1921 21 end USA Linear 25.0 Wood 0 1 0 0 MHF-057 MHF-D2 1
Keuffel & Esser 4053-3 Polyphase Mannheim 1921 862 end USA Linear 25.0 Wood 0 1 0 0 MHF-565 Display 0
Keuffel & Esser 4053-3 Polyphase Mannheim 1921 114 end USA Linear 25.0 Wood 0 1 0 0 MHF-058 MHF-D2 1
Keuffel & Esser 4053-3 Polyphase Mannheim, Metal Cursor 1915 386 USA Linear 25.0 Wood 0 1 0 0 MHF-055 MHF-D2 1
Keuffel & Esser 4053-3F Polyphase Mannheim 1922 427x end USA Linear 25.0 Wood 0 1 0 0 MHF-059 MHF-D2 1
Keuffel & Esser 4053-5 Polyphase Mannheim 1921 2? end USA Linear 50.0 Wood 0 0 0 0 MHF-553 MHF-D11 0
Keuffel & Esser 4053-5 Polyphase Mannheim 1921 41 end USA Linear 50.0 Wood 0 0 0 0 MHF-538 MHF-D11 0
Keuffel & Esser 4053-5 Polyphase Mannheim 1958 480009 USA Linear 50.0 Wood 1 0 0 0 MHF-106 MHF-D11 0
Keuffel & Esser 4054 Favorite 1914 623 end USA Linear 25.0 Wood 0 1 0 0 MHF-091 MHF-D3 1
Keuffel & Esser 4054 Favorite 1914 429 end USA Linear 25.0 Wood 0 1 0 0 MHF-092 MHF-D3 1
Keuffel & Esser 4054 Polyphase Mannheim 1948 446303 USA Linear 25.0 Wood 0 1 0 0 MHF-096 MHF-D3 1
Keuffel & Esser 4055 Favorite Mannheim 1936 524406 USA Linear 25.0 Wood 0 1 1 0 MHF-093 MHF-D3 1
Keuffel & Esser 4055 Favorite Mannheim 1937 625594 USA Linear 25.0 Wood 0 1 1 0 MHF-094 MHF-D3 1
Keuffel & Esser 4056 Favorite Mannheim 1949 758469 USA Linear 25.0 Wood 0 1 0 0 MHF-095 MHF-D3 1
Keuffel & Esser 4056 Favorite Mannheim Type 1 1922 63 End USA Linear 25.0 Wood 0 1 0 0 MHF-548 MHF-D3 1
Keuffel & Esser 4058 Mannheim Student's 1915 USA Linear 25.0 Wood 0 0 1 0 MHF-590 MHF-D1 1
Keuffel & Esser 4058 Mannheim Student's 1922 USA Linear 25.0 Wood 0 1 0 0 MHF-022 MHF-D1 1
Keuffel & Esser 4058 Mannheim Student's 1922 USA Linear 25.0 Wood 0 0 0 0 MHF-021 MHF-D1 1
Keuffel & Esser 4058C Beginner's 1941 USA Linear 25.0 Wood 0 1 0 0 MHF-023 MHF-D1 1
Keuffel & Esser 4058C Beginner's 1941 USA Linear 25.0 Wood 0 1 0 0 MHF-024 MHF-D1 1
Keuffel & Esser 4058C Beginner's 1941 USA Linear 25.0 Wood 0 1 0 0 MHF-025 MHF-D1 1
Keuffel & Esser 4058D Beginner’s 1942 USA Linear 25.0 Wood 0 0 1 0 MHF-549 MHF-D1 1
Keuffel & Esser 4058W Mannheim Beginner's 1934 USA Linear 25.0 Wood 0 1 0 0 MHF-026 MHF-D1 1
Keuffel & Esser 4058W Mannheim Beginner's 1943 USA Linear 25.0 Wood 0 1 0 0 MHF-028 MHF-D1 1
Keuffel & Esser 4058W Mannheim Beginner's 1943 USA Linear 25.0 Wood 0 0 0 0 MHF-585 Display 0
Keuffel & Esser 4058W Mannheim Beginner's 1943 USA Linear 25.0 Wood 0 1 0 0 MHF-027 MHF-D1 1
Keuffel & Esser 4058W Mannheim Beginner's 1943 USA Linear 25.0 Wood 0 1 0 0 MHF-029 MHF-D1 1
Keuffel & Esser 4058W Mannheim Beginner's 1959 USA Linear 25.0 Wood 0 1 0 0 MHF-589 MHF-D1 1
Keuffel & Esser 4059 Beginner's Slide Rule 1939 USA Linear 20.0 Wood 0 0 0 0 MHF-273 MHF-D1 1
Keuffel & Esser 4061 Polyphase Trig 1916 81 end USA Linear 12.5 Wood 1 1 0 1 MHF-588 MHF-D3 1
Keuffel & Esser 4061T Polyphase Trig 1916 28 end USA Linear 12.5 Wood 1 1 0 1 MHF-110 MHF-D3 1
Keuffel & Esser 4065T Polyphase Trig 1916 89 end USA Linear 20.0 Wood 1 1 0 1 MHF-112 MHF-D3 1
Keuffel & Esser 4068 Duplex 1906 9 end USA Linear 20.0 Wood 1 1 0 0 MHF-111 Cabinet 0
Keuffel & Esser 4070-3 Polyphase Trig 1939 705222 USA Linear 25.0 Wood 1 1 0 0 MHF-150 MHF-D4 0
Keuffel & Esser 4070-3 Polyphase Trig 1952 889486 Arthur I. McRae USA Linear 25.0 Wood 1 1 0 0 MHF-149 MHF-D4 0
Keuffel & Esser 4071 Polyphase 1915 107 end USA Linear 25.0 Wood 1 0 0 0 MHF-113 MHF-D3 1
Keuffel & Esser 4071-3 Polyphase Decitrig 1944 106905 USA Linear 25.0 Wood 1 1 0 0 MHF-151 MHF-D4 0
Keuffel & Esser 4071-3 Polyphase Decitrig 1946 292228 USA Linear 25.0 Wood 1 1 1 0 MHF-152 MHF-D4 0
Keuffel & Esser 4071-3S Polyphase Decitrig 1958 186059 USA Linear 25.0 Wood 1 1 1 1 MHF-153 MHF-D4 0
Keuffel & Esser 4071T Polyphase Trig 1915 82 end USA Linear 25.0 Wood 1 1 0 0 MHF-116 MHF-D3 1
Keuffel & Esser 4071T Polyphase Trig (Clamshell Cursor) 1912 77 end USA Linear 25.0 Wood 1 0 0 0 MHF-115 MHF-D3 1
Keuffel & Esser 4071T Polyphase Trig (Column Cursor) 1914 99 end USA Linear 25.0 Wood 1 1 0 0 MHF-117 MHF-D3 1
Keuffel & Esser 4080-3 Log Log Trig 1935 559197 USA Linear 25.0 Wood 1 1 0 0 MHF-182 MHF-D5 0
Keuffel & Esser 4080-3 Log Log Trig 1946 296511 USA Linear 25.0 Wood 1 1 0 0 MHF-567 Display 0
Keuffel & Esser 4080-3 Log Log Trig 1950 669436 USA Linear 25.0 Wood 1 1 0 0 MHF-183 MHF-D5 0
Keuffel & Esser 4080-5 Log Log Trig 1946 317656 USA Linear 50.0 Wood 1 1 0 0 MHF-209 MHF-D7 0
Keuffel & Esser 4081-3 Log Log Decitrig 1949 690721 USA Linear 25.0 Wood 1 1 0 1 MHF-187 MHF-D6 0
Keuffel & Esser 4081-3 Log Log Decitrig 1955 859163 USA Linear 25.0 Wood 1 1 0 0 MHF-188 MHF-D6 0
Keuffel & Esser 4081-3 Log Log Decitrig 1955 940854 USA Linear 25.0 Wood 1 1 0 0 MHF-789 MHF-D6 0
Keuffel & Esser 4081-5 Log Log Decitrig 1954 976246 USA Linear 50.0 Wood 1 1 0 0 MHF-210 MHF-D7 0
Keuffel & Esser 4081-5 Log Log Decitrig 1955 5156 USA Linear 50.0 Wood 1 1 0 0 MHF-211 MHF-D7 0
Keuffel & Esser 4081-5 Log Log Decitrig Teaching 1954 USA Linear 198.0 Wood 1 0 0 1 MHF-819 Wall 0
Keuffel & Esser 4082-3 Radio Special 1940 834533 Naval TR. School 299 USA Linear 25.0 Wood 1 1 0 0 MHF-257 MHF-D10 0
Keuffel & Esser 4082-3 Radio Special 1940 867096 USA Linear 25.0 Wood 1 1 0 0 MHF-258 MHF-D10 0
Keuffel & Esser 4083 Polyphase (Column Cursor) 1915 42 End USA Linear 40.0 Wood 1 1 0 0 MHF-118 MHF-D3 0
Keuffel & Esser 4083-3 Log Log Vector 1946 257986 USA Linear 25.0 Wood 1 0 0 1 MHF-202 MHF-D6 0
Keuffel & Esser 4083-3 Log Log Vector 1949 534971 USA Linear 25.0 Wood 1 1 0 1 MHF-570 Display 0
Keuffel & Esser 4083-5 Log Log Vector 1943 945538 USA Linear 50.0 Wood 1 1 0 0 MHF-213 MHF-D7 0
Keuffel & Esser 4085A 1925 Early w/ 4031 sn 97196 USA Magnifier 0.0 Metal 0 0 0 0 MHF-558 Cabinet 0
Keuffel & Esser 4085B 1922 Early w/ N4053-2 68048 USA Magnifier 0.0 Metal 0 0 0 0 MHF-550 MHF-D2 1
Keuffel & Esser 4085B 1922 Early w/ N4053-3F 472x USA Magnifier 0.0 Metal 0 0 0 0 MHF-551 MHF-D2 1
Keuffel & Esser 4085C 1914 On 4092 Column Cursor USA Magnifier 0.0 Metal 0 0 0 0 MHF-555 MHF-D5 0
Keuffel & Esser 4085C 1914 On 4087 Column Cursor USA Magnifier 0.0 Metal 0 0 0 0 MHF-554 MHF-D3 0
Keuffel & Esser 4087 Polyphase 1916 41 end USA Linear 50.0 Wood 1 0 1 0 MHF-121 MHF-D3 0
Keuffel & Esser 4087 Polyphase 1916 41 end USA Linear 50.0 Wood 1 0 1 0 MHF-120 MHF-D3 0
Keuffel & Esser 4087 Polyphase 1916 43 end USA Linear 50.0 Wood 1 0 0 0 MHF-161 MHF-D3 0
Keuffel & Esser 4087 Polyphase (Column Cursor) 1914 11 end USA Linear 50.0 Wood 1 1 0 0 MHF-119 MHF-D3 0
Keuffel & Esser 4087T Polyphase (Clamshell Cursor) 1916 27 end USA Linear 50.0 Wood 1 0 1 0 MHF-780 MHF-D3 0
Keuffel & Esser 4088-1 Polyphase 1922 93 end USA Linear 12.5 Wood 1 1 0 0 MHF-124 MHF-D4 1
Keuffel & Esser 4088-1 Polyphase 1924 13 end USA Linear 12.5 Wood 1 0 0 0 MHF-125 MHF-D4 1
Keuffel & Esser 4088-1 Polyphase 1929 191776 USA Linear 12.5 Wood 1 1 0 0 MHF-126 MHF-D4 1
Keuffel & Esser 4088-1 Polyphase 1929 224775 USA Linear 12.5 Wood 1 1 0 1 MHF-127 MHF-D4 1
Keuffel & Esser 4088-1 Polyphase 1929 298444 USA Linear 12.5 Wood 1 1 0 0 MHF-129 MHF-D4 1
Keuffel & Esser 4088-1 Polyphase 1929 221666 USA Linear 12.5 Wood 1 1 0 0 MHF-572 Display 0
Keuffel & Esser 4088-1 Polyphase 1933 362571 USA Linear 12.5 Wood 1 1 0 0 MHF-128 MHF-D4 1
Keuffel & Esser 4088-2 Polyphase 1928 38 end USA Linear 20.0 Wood 1 1 0 0 MHF-274 MHF-D4 0
Keuffel & Esser 4088-2 Polyphase 1928 179874 USA Linear 20.0 Wood 1 1 0 1 MHF-132 MHF-D4 0
Keuffel & Esser 4088-2 Polyphase 1929 241354 USA Linear 20.0 Wood 0 1 0 0 MHF-573 Display 0
Keuffel & Esser 4088-2 Polyphase (Column Cursor) 1914 70 end USA Linear 20.0 Wood 1 1 0 1 MHF-130 MHF-D4 0
Keuffel & Esser 4088-2 Polyphase (Metal Cursor) 1915 63 end USA Linear 20.0 Wood 0 1 0 0 MHF-131 MHF-D4 0
Keuffel & Esser 4088-3 Polyphase 1921 593 end USA Linear 25.0 Wood 0 1 0 0 MHF-574 Display 0
Keuffel & Esser 4088-3 Polyphase 1923 77733 USA Linear 25.0 Wood 1 1 0 0 MHF-138 MHF-D4 0
Keuffel & Esser 4088-3 Polyphase 1925 77086 USA Linear 25.0 Wood 1 1 0 0 MHF-136 MHF-D4 0
Keuffel & Esser 4088-3 Polyphase (Column Cursor) 1914 31 end USA Linear 25.0 Wood 1 1 0 0 MHF-134 MHF-D4 0
Keuffel & Esser 4088-3 Polyphase (Column Cursor) 1915 88 x end USA Linear 25.0 Wood 1 1 0 0 MHF-133 MHF-D4 0
Keuffel & Esser 4088-3 Polyphase (I-Beam Cursor) 1938 382044 USA Linear 25.0 Wood 1 1 0 1 MHF-137 MHF-D4 0
Keuffel & Esser 4088-3 Polyphase (Metal Cursor) 1915 165 end USA Linear 25.0 Wood 1 0 0 1 MHF-135 MHF-D4 0
Keuffel & Esser 4088-5 Polyphase 1921 63 end USA Linear 50.0 Wood 1 1 0 1 MHF-575 Display 0
Keuffel & Esser 4088-5 Polyphase 1921 11 End USA Linear 50.0 Wood 0 1 0 0 MHF-139 MHF-D11 0
Keuffel & Esser 4088-5 Polyphase 1921 44 end USA Linear 50.0 Wood 1 1 0 0 MHF-140 MHF-D11 0
Keuffel & Esser 4088-5 Polyphase 1923 54790 USA Linear 50.0 Wood 1 0 0 1 MHF-607 MHF-D11 0
Keuffel & Esser 4090-3 Log Log Trig 1934 470428 USA Linear 25.0 Wood 1 1 0 0 MHF-178 MHF-D5 0
Keuffel & Esser 4091-3 Log Log DeciTrig 1933 456584 USA Linear 25.0 Wood 1 1 0 0 MHF-179 MHF-D5 0
Keuffel & Esser 4091-3 Log Log DeciTrig 1934 474048 USA Linear 25.0 Wood 1 1 0 0 MHF-180 MHF-D5 0
Keuffel & Esser 4091-3 Log Log DeciTrig, (I Beam) 1934 455753 USA Linear 25.0 Wood 1 1 0 0 MHF-181 MHF-D5 0
Keuffel & Esser 4092 Log Log 1914 86 end USA Linear 25.0 Wood 0 1 0 1 MHF-169 MHF-D5 0
Keuffel & Esser 4092 Log Log 1921 79 end USA Linear 25.0 Wood 1 1 0 0 MHF-168 MHF-D5 0
Keuffel & Esser 4092 Log Log 1921 131 end USA Linear 25.0 Wood 1 1 0 0 MHF-166 MHF-D5 0
Keuffel & Esser 4092 Log Log 1921 187 end USA Linear 25.0 Wood 1 1 0 1 MHF-167 MHF-D5 0
Keuffel & Esser 4092 Log Log (Clamshell Cursor) 1913 142 end USA Linear 25.0 Wood 1 0 0 0 MHF-163 MHF-D5 0
Keuffel & Esser 4092 Log Log (Clamshell Cursor) 1913 19x end USA Linear 25.0 Wood 1 1 0 0 MHF-162 MHF-D5 0
Keuffel & Esser 4092 Log Log (Column Cursor) 1914 21 end USA Linear 25.0 Wood 1 0 0 0 MHF-165 MHF-D5 0
Keuffel & Esser 4092 Log Log (Column Cursor) 1914 141 end USA Linear 25.0 Wood 1 0 0 0 MHF-164 MHF-D5 0
Keuffel & Esser 4092-3 Log Log 1922 8013 USA Linear 25.0 Wood 1 1 0 0 MHF-174 MHF-D5 0
Keuffel & Esser 4092-3 Log Log 1922 8990 24S end USA Linear 25.0 Wood 1 1 0 0 MHF-170 MHF-D5 0
Keuffel & Esser 4092-3 Log Log 1923 130851 USA Linear 25.0 Wood 1 0 0 0 MHF-172 MHF-D5 0
Keuffel & Esser 4092-3 Log Log 1925 118377 USA Linear 25.0 Wood 1 1 0 0 MHF-176 MHF-D5 0
Keuffel & Esser 4092-3 Log Log 1936 339820 USA Linear 25.0 Wood 1 1 0 0 MHF-171 MHF-D5 0
Keuffel & Esser 4092-3 Log Log 1936 405149 USA Linear 25.0 Wood 1 1 0 0 MHF-175 MHF-D5 0
Keuffel & Esser 4092-3 Log Log 1936 504659 USA Linear 25.0 Wood 1 0 0 0 MHF-177 MHF-D5 0
Keuffel & Esser 4092-3 Log Log (Tabbed Cursor) 1936 400616 USA Linear 25.0 Wood 1 1 0 0 MHF-173 MHF-D5 0
Keuffel & Esser 4092-5 Log Log 1923 62988 USA Linear 50.0 Wood 1 0 1 0 MHF-205 MHF-D7 0
Keuffel & Esser 4093-3 Log Log Vector 1935 521109 USA Linear 25.0 Wood 1 1 0 0 MHF-200 MHF-D6 0
Keuffel & Esser 4093-3 Log Log Vector 1936 548842 USA Linear 25.0 Wood 1 1 1 0 MHF-201 MHF-D6 0
Keuffel & Esser 4094 Merchant's 1935 561521 USA Linear 25.0 Wood 0 1 0 0 MHF-228 MHF-D9 0
Keuffel & Esser 4094 Merchant's 1950 590046 USA Linear 25.0 Wood 0 1 0 0 MHF-229 MHF-D9 0
Keuffel & Esser 4095 Merchant's 1921 14 end USA Linear 25.0 Wood 1 0 0 0 MHF-235 MHF-D9 1
Keuffel & Esser 4095 Merchant's 1921 2 end USA Linear 25.0 Wood 1 1 0 0 MHF-796 MHF-D9 1
Keuffel & Esser 4095-1 Merchant's 1927 130339 USA Linear 12.5 Wood 1 0 0 0 MHF-234 MHF-D9 1
Keuffel & Esser 4095-3 Merchant's 1928 253609 USA Linear 25.0 Wood 1 1 0 0 MHF-237 MHF-D9 1
Keuffel & Esser 4097B Merchant's Ever-There 1943 64232 USA Linear 12.5 Plastic 0 1 0 0 MHF-084 MHF-D3 1
Keuffel & Esser 4097B Merchant's Ever-There 1954 033393 USA Linear 12.5 Plastic 0 1 1 0 MHF-085 MHF-D3 1
Keuffel & Esser 4097C Mannheim Ever-There 1943 009962 USA Linear 12.5 Plastic 0 1 1 0 MHF-087 MHF-D3 1
Keuffel & Esser 4097C Mannheim Ever-There 1943 27705 USA Linear 12.5 Plastic 0 1 1 0 MHF-086 MHF-D3 1
Keuffel & Esser 4097D Mannheim Ever-There 1944 89125 USA Linear 12.5 Paper 0 1 0 1 MIT MIT 0
Keuffel & Esser 4097D Mannheim Ever-There 1944 019432 John W. Futral USA Linear 12.5 Plastic 0 1 0 0 MHF-089 MHF-D3 1
Keuffel & Esser 4097D Mannheim Ever-There 1946 146320 U.S. Electrical Motors Inc. USA Linear 12.5 Plastic 0 1 0 0 MHF-090 MHF-D3 1
Keuffel & Esser 4097D Mannheim Ever-There 1954 105130 USA Linear 12.5 Plastic 0 1 1 0 MHF-088 MHF-D3 1
Keuffel & Esser 4098 Mannheim "EverThere" 1935 32162 USA Linear 12.5 Plastic 0 1 0 0 MHF-079 MHF-D3 1
Keuffel & Esser 4098 Mannheim "EverThere" 1935 18425 USA Linear 12.5 Plastic 0 1 0 0 MHF-080 MHF-D3 1
Keuffel & Esser 4098A Mannheim "Pocket" 1943 48232 USA Linear 12.5 Plastic 0 1 0 0 MHF-083 MHF-D3 1
Keuffel & Esser 4098A Mannheim "Pocket" 1943 77180 USA Linear 12.7 Plastic 0 1 0 0 MHF-797 MHF-D3 1
Keuffel & Esser 4098A Mannheim "Pocket" 1943 95097 USA Linear 12.5 Plastic 0 1 1 0 MHF-082 MHF-D3 1
Keuffel & Esser 4100 Mannheim Stadia 1957 230106 USA Linear 25.0 Wood 0 1 0 0 MHF-239 MHF-D9 0
Keuffel & Esser 4100 Mannheim Stadia 1957 290831 USA Linear 25.0 Wood 0 1 0 0 MHF-240 MHF-D9 0
Keuffel & Esser 4100 Mannheim Stadia 1958 433578 USA Linear 25.0 Wood 0 1 0 0 MHF-241 MHF-D9 0
Keuffel & Esser 4101 Mannheim Stadia 1914 46 end USA Linear 50.0 Wood 0 1 0 0 MHF-243 MHF-D9 0
Keuffel & Esser 4101 Mannheim Stadia 1923 130 end USA Linear 50.0 Wood 0 1 0 0 MHF-244 MHF-D9 0
Keuffel & Esser 4102 Surveyor's 1923 62 end USA Linear 50.0 Wood 1 0 1 0 MHF-246 MHF-D9 0
Keuffel & Esser 4102 Surveyor's 1925 41498 USA Linear 50.0 Wood 1 1 0 0 MHF-247 MHF-D9 0
Keuffel & Esser 4104 Special Production Slide Rule of Military Use 1955 044175 USA Linear 50.0 Wood 0 0 0 0 MHF-291 MHF-D7 0
Keuffel & Esser 4108 Military Slide Rule 1945 229213 USA Linear 25.0 Wood 0 1 0 0 MHF-784 MHF-D13 0
Keuffel & Esser 4110 Power Trig 1940 800046 USA Linear 33.5 Wood 0 0 0 0 MHF-099 MHF-D13 1
Keuffel & Esser 4133 Mannheim Roy Lance Electrican's 1922 347 End USA Linear 20.0 Wood 0 1 0 0 MHF-254 MHF-D10 0
Keuffel & Esser 4135 Power Computing 1932 361628 USA Linear 12.5 Wood 1 1 0 0 MHF-260 MHF-D10 0
Keuffel & Esser 4138 Morrison Radio Engineer’s Slide Rule 1939 659861 USA Linear 25.0 Wood 1 1 0 1 MHF-800 MHF-10 1
Keuffel & Esser 4139 Cooke Radio Rule 1946 313985 USA Linear 25.0 Wood 1 1 1 0 MHF-249 MHF-D10 0
Keuffel & Esser 4139 Cooke Radio Rule 1948 496748 USA Linear 25.0 Wood 1 1 0 0 MHF-252 MHF-D10 0
Keuffel & Esser 4139 Cooke Radio Rule 1957 363799 USA Linear 25.0 Wood 1 1 1 0 MHF-250 MHF-D10 0
Keuffel & Esser 4139 Cooke Radio Rule 1958 452405 USA Linear 25.0 Wood 1 1 0 0 MHF-251 MHF-D10 0
Keuffel & Esser 4139 Cooke Radio Rule 1962 775559 USA Linear 25.0 Wood 1 1 0 1 MHF-584 Display 0
Keuffel & Esser 4141 Hudson's Horse Power Computing Scale 1913 Stanley London UK Special 10.7 Wood 0 1 0 0 MHF-544 Cabinet 1
Keuffel & Esser 4150-1 (9050-1) Mannheim Merchant's 1954 009583 USA Linear 12.5 Plastic 0 1 1 0 MHF-227 MHF-D9 0
Keuffel & Esser 4150-1 Mannheim Merchant's 1954 002878 USA Linear 12.5 Plastic 0 1 1 0 MHF-225 MHF-D9 0
Keuffel & Esser 4150-1 Mannheim Merchant's Doric 1954 4293 Pat Pend USA Linear 12.5 Plastic 0 1 0 0 MHF-224 MHF-D9 0
Keuffel & Esser 4150-1 Mannheim Merchant's Doric 1956 19071827 USA Linear 12.5 Plastic 0 1 0 0 MHF-798 MHF-D9 0
Keuffel & Esser 4153-1 Polyphase Mannheim 1959 064995 USA Linear 12.5 Plastic 0 1 0 0 MHF-038 MHF-D1 1
Keuffel & Esser 4158 K-12 Prep 1961 USA Linear 25.0 Plastic 0 1 0 0 MHF-591 MHF-D2 1
Keuffel & Esser 4158 K-12 Prep 1961 USA Linear 25.0 Plastic 0 1 0 0 MHF-592 MHF-D2 1
Keuffel & Esser 4158 K-12 Prep 1961 USA Linear 25.0 Plastic 0 1 0 0 MHF-034 MHF-D2 1
Keuffel & Esser 4160 Chemist's Slide Rule 1923 18270 USA Linear 25.0 Wood 1 0 0 0 MHF-262 MHF-D10 0
Keuffel & Esser 4160 Chemist's Slide Rule 1932 284731 USA Linear 25.0 Wood 1 0 0 1 MHF-636 MHF-D10 0
Keuffel & Esser 4160 Chemist's Slide Rule 1932 355964 USA Linear 25.0 Wood 1 1 0 0 MHF-261 MHF-D10 0
Keuffel & Esser 4161-1 Polyphase Mannheim 1954 40220 USA Linear 12.5 Plastic 0 1 0 1 MHF-109 MHF-D3 1
Keuffel & Esser 4161-1 Polyphase Mannheim 1954 024555 USA Linear 12.5 Plastic 0 0 0 1 MHF-108 MHF-D3 1
Keuffel & Esser 4161-3 Mannheim 1954 023720 USA Linear 25.0 Paper 0 1 0 0 MHF-078 MHF-D3 1
Keuffel & Esser 4161-3 Mannheim 1954 025172 USA Linear 25.0 Plastic 0 1 0 0 MHF-077 MHF-D3 1
Keuffel & Esser 4168 Polyphase Doric 1954 009990 USA Linear 12.5 Plastic 1 0 0 0 MHF-146 MHF-D4 0
Keuffel & Esser 4168 Polyphase Doric 1958 424114 USA Linear 12.5 Plastic 0 1 0 0 MHF-145 MHF-D4 0
Keuffel & Esser 4175 Kurtz Psychrometic 1938 USA Linear 23.0 Wood 0 1 0 1 MHF-263 MHF-D10 0
Keuffel & Esser 4181-1 Log Log Decitrig 1954 29473 USA Linear 12.5 Plastic 1 1 1 0 MHF-158 MHF-D4 0
Keuffel & Esser 4181-1 Log Log Decitrig 1955 029974 USA Linear 12.5 Plastic 1 1 0 0 MHF-157 MHF-D4 0
Keuffel & Esser 4181-1C Log Log Dectrig 1954 013986 USA Linear 12.5 Plastic 1 1 0 0 MHF-159 MHF-D4 0
Keuffel & Esser 4181-3 Log Log Decitrig 1954 015574 USA Linear 25.0 Plastic 1 1 1 0 MHF-196 MHF-D6 0
Keuffel & Esser 4181-3 Log Log Decitrig 1954 001578 USA Linear 25.0 Plastic 1 1 0 0 MHF-195 MHF-D6 0
Keuffel & Esser 4183B Belt Carrier 0 USA No Value 0.0 Metal 0 0 1 0 MHF-282 MHF-D10 0
Keuffel & Esser 4185-17 0 USA Magnifier 0.0 Metal 0 1 1 0 MHF-280 MHF-D10 0
Keuffel & Esser 4185-7 0 USA Magnifier 0.0 Metal 0 1 1 0 MHF-279 MHF-D10 0
Keuffel & Esser 4185B 0 w/ N4053-3 043255 USA Magnifier 0.0 Metal 0 0 0 0 MHF-552 MHF-D2 1
Keuffel & Esser 4185B 0 USA Magnifier 0.0 Metal 0 0 1 0 MHF-277 MHF-D10 0
Keuffel & Esser 4185B 0 USA Magnifier 0.0 Metal 0 0 1 0 MHF-275 MHF-D10 0
Keuffel & Esser 4185B 0 USA Magnifier 0.0 Metal 0 0 0 0 MHF-276 MHF-D10 0
Keuffel & Esser 4185B 0 w/ N4053-3 012841 USA Magnifier 0.0 Metal 0 0 1 0 MHF-587 MHF-D2 1
Keuffel & Esser 4185C 0 USA Magnifier 0.0 Metal 0 0 1 0 MHF-278 MHF-D10 0
Keuffel & Esser 4185C 0 w/ N4081-3 519945 USA Magnifier 0.0 Metal 0 0 1 0 MHF-569 Display 0
Keuffel & Esser 4280 Amsler Intergrator 0 1196 USA Planimeter 0.0 Metal 0 0 1 0 MHF-818 Top Flat Files 0
Keuffel & Esser 6-C-1 US Navy (4168 Projection) 1957 USA Linear 20.0 Plastic 0 1 0 0 MHF-283 MHF-D12 0
Keuffel & Esser 62000 Compensating Polar 1962 95 229 Germany Planimeter 260.2 Metal 0 0 1 0 MHF-484 MHF-D14 0
Keuffel & Esser 68 1100 Deci-Lon 1962 28536 USA Linear 25.0 Plastic 1 0 0 0 MHF-571 Display 0
Keuffel & Esser 68 1100 Deci-Lon 1962 198975 USA Linear 25.0 Plastic 1 1 0 0 MHF-557 MHF-D8 0
Keuffel & Esser 68 1100 Deci-Lon 1962 013952 USA Linear 25.0 Plastic 1 1 0 0 MHF-216 MHF-D8 0
Keuffel & Esser 68 1100 Deci-Lon 1962 096252 USA Linear 25.0 Plastic 1 1 0 0 MHF-217 MHF-D8 0
Keuffel & Esser 68 1100 Deci-Lon 1962 134429 USA Linear 25.0 Plastic 1 1 0 0 MHF-218 MHF-D8 0
Keuffel & Esser 68 1100 Deci-Lon (no bars) 1966 236464 USA Linear 25.0 Plastic 0 1 0 0 MHF-219 MHF-D8 0
Keuffel & Esser 68 1100 Deci-Lon (no bars) 1966 262936 USA Linear 25.0 Plastic 1 1 0 0 MHF-221 MHF-D8 0
Keuffel & Esser 68 1100 Deci-Lon (no bars) 1966 244573 USA Linear 25.0 Paper 1 1 0 0 MHF-220 MHF-D8 0
Keuffel & Esser 68 1130 Deci-Lon 1961 036452 USA Linear 12.5 Plastic 0 1 0 0 MHF-215 Cabinet 0
Keuffel & Esser 68 1130 Deci-Lon 1961 022454 USA Linear 12.5 Plastic 1 1 0 0 MHF-214 MHF-D8 0
Keuffel & Esser 68 1200 Log Log Decitrig 1959 480149 USA Linear 50.0 Wood 1 1 0 0 MHF-212 MHF-D7 0
Keuffel & Esser 68 1210 Log Log Decitrig 1956 270158 USA Linear 25.0 Wood 1 0 0 0 MHF-192 MHF-D6 0
Keuffel & Esser 68 1210 Log Log Decitrig 1958 320384 USA Linear 25.0 Wood 1 1 0 0 MHF-191 MHF-D6 0
Keuffel & Esser 68 1251 Jet-Log 1962 119342 USA Linear 25.0 Plastic 1 1 0 0 MHF-198 MHF-D6 0
Keuffel & Esser 68 1256 Jet-Log 1966 124832 USA Linear 25.0 Plastic 1 1 1 0 MHF-199 MHF-D6 0
Keuffel & Esser 68 1256 Log Log Duplex Decitrig - Old 4181-3 1962 034165 USA Linear 25.0 Plastic 1 1 1 0 MHF-197 MHF-D6 0
Keuffel & Esser 68 1282 (4181-1C) Log Log Decitrig 1965 073387 USA Linear 12.5 Plastic 1 1 1 0 MHF-160 MHF-D4 0
Keuffel & Esser 68 1318 Log Log Trig 1963 850517 USA Linear 25.0 Wood 1 1 0 0 MHF-186 MHF-D5 0
Keuffel & Esser 68 1343 Old 4083-3 Log Log Vector 1962 670347 USA Linear 25.0 Wood 1 1 1 0 MHF-810 MHF-D6 0
Keuffel & Esser 68 1400 Analon 1966 004661 USA Linear 25.0 Plastic 0 1 1 0 MHF-223 Cabinet 0
Keuffel & Esser 68 1434 Log Log Vector 1962 460048 USA Linear 25.0 Wood 1 1 0 0 MHF-204 MHF-D6 0
Keuffel & Esser 68 1460 Cooke Radio Rule 1962 790157 USA Linear 25.0 Wood 1 1 0 0 MHF-253 MHF-D10 0
Keuffel & Esser 68 1486 (4143) Kissam Stadia 1962 398915 USA Linear 25.0 Plastic 0 1 0 0 MHF-242 MHF-D9 0
Keuffel & Esser 68 1497 Polyphase Decitrig 1959 540106 USA Linear 25.0 Wood 1 1 0 0 MHF-154 MHF-D4 0
Keuffel & Esser 68 1555 Polyphase Doric 1966 037383 USA Linear 12.5 Plastic 0 1 0 0 MHF-594 MHF-D4 0
Keuffel & Esser 68 1565 GP12 1967 033613 USA Linear 25.0 Plastic 0 1 0 0 MHF-222 MHF-D8 0
Keuffel & Esser 68 1576 (4161-3) Mannheim 1954 008308 USA Linear 25.0 Plastic 0 1 1 0 MHF-076 MHF-D3 1
Keuffel & Esser 68 1586 (4161-1) Manheim 1962 019198 USA Linear 12.5 Plastic 0 1 1 0 MHF-075 MHF-D3 1
Keuffel & Esser 68 1608 Polyphase Mannheim 1960 520285 USA Linear 50.0 Wood 0 1 0 0 MHF-556 MHF-D11 0
Keuffel & Esser 68 1608 Polyphase Mannheim 1968 200089 USA Linear 50.0 Wood 1 0 0 0 MHF-107 MHF-D11 0
Keuffel & Esser 68 1617 (4053-3) Polyphase Mannheim 1962 201058 USA Linear 25.0 Wood 0 1 0 0 MHF-069 MHF-D2 1
Keuffel & Esser 68 1622 (4053-3, 68 1617) Polyphase Mannheim 1962 941324 USA Linear 25.0 Wood 0 1 1 0 MHF-070 MHF-D2 1
Keuffel & Esser 68 1643 (4153-1C) Polyphase Mannheim 1962 018474 USA Linear 12.5 Plastic 0 1 1 0 MHF-039 MHF-D1 1
Keuffel & Esser 68 1749 Mannheim Merchant's 1966 290013 USA Linear 50.0 Wood 0 0 1 0 MHF-536 Top Flat Files 0
Keuffel & Esser 68 1754 Mannheim Merchant's 1964 970082 USA Linear 50.0 Wood 0 1 0 0 MHF-233 MHF-D9 0
Keuffel & Esser 68 1775 Merchant's 1965 400370 USA Linear 25.0 Wood 0 1 0 0 MHF-231 MHF-D9 0
Keuffel & Esser 68 1775 Merchant's 1965 300031 USA Linear 25.0 Wood 0 1 1 0 MHF-230 MHF-D9 0
Keuffel & Esser 68 1791 (4150-1) Mannheim Merchant's 1962 004929 USA Linear 12.5 Plastic 0 1 1 0 MHF-226 MHF-D9 0
Keuffel & Esser 68 1892 K-12 Prep 1972 USA Linear 25.0 Plastic 0 0 0 0 MHF-586 Display 0
Keuffel & Esser 68 1892 K-12 Prep 1972 USA Linear 25.0 Plastic 0 1 0 0 MHF-035 MHF-D2 1
Keuffel & Esser 68 1892 K-12 Prep Desk 1972 USA Linear 25.0 Plastic 0 0 1 0 MHF-037 MHF-D2 1
Keuffel & Esser 68 1892 K-12 Prep Desk 1972 USA Linear 25.0 Plastic 0 0 1 0 MHF-036 MHF-D2 1
Keuffel & Esser 68 2233 (4185-17) Magnifier 1966 USA Magnifier 0.0 Metal 0 0 1 0 MHF-281 MHF-D10 0
Keuffel & Esser 69 1955 Deci-Lon Projection 1967 USA Linear 20.0 Plastic 1 1 1 0 MHF-284 MHF-D12 0
Keuffel & Esser 7L Indicator Glass 0 x3 USA Magnifier 0.0 Plastic 0 1 0 0 0
Keuffel & Esser 8858 Mannheim Beginner's WWII special 1944 1942 USA Linear 25.0 Wood 0 0 0 0 MHF-033 MHF-D1 1
Keuffel & Esser 8858 Mannheim Beginner's WWII special 1944 1942 USA Linear 25.0 Wood 0 0 1 0 MHF-032 MHF-D1 1
Keuffel & Esser 8858 Mannheim Beginner's WWII special 1944 1942 USA Linear 25.0 Wood 0 0 1 0 MHF-635 Wright Museum 0
Keuffel & Esser 9061-1 Doric Mannheim 1949 7486 USA Linear 12.5 Plastic 0 1 1 0 MHF-074 MHF-D3 1
Keuffel & Esser 9068 Doric Plastic Polyphase 1947 056542 USA Linear 12.5 Plastic 0 1 0 0 MHF-144 MHF-D4 0
Keuffel & Esser 9068 Doric Plastic Polyphase 1952 4823 USA Linear 12.5 Plastic 1 1 0 0 MHF-143 MHF-D4 0
Keuffel & Esser 9071-3 Doric Polyphase Decitrig 1952 0012930 USA Linear 25.0 Plastic 1 1 0 0 MHF-156 MHF-D4 0
Keuffel & Esser 9071-3 Doric Polyphase Decitrig 1952 013371 USA Linear 25.0 Wood 1 1 0 0 MHF-155 MHF-D4 0
Keuffel & Esser American Mannheim 0 63 end USA Linear 25.0 Wood 0 1 0 0 MHF-097 MHF-D3 1
Keuffel & Esser American Mannheim 0 97 E end USA Linear 25.0 Wood 0 1 0 0 MHF-098 MHF-D3 1
Keuffel & Esser Beatley I-Q Slide Rule 1922 USA Special 19.0 Wood 0 0 0 0 MHF-264 MHF-D10 0
Keuffel & Esser Belleville Spring Washer Computer 1967 USA Special 25.0 Plastic 1 1 0 0 MHF-593 MHF-D8 0
Keuffel & Esser Brick-O-Meter, Mackensen C. Co. Inc. 1938 USA Special 24.2 Wood 0 1 0 0 MHF-265 MHF-D10 0
Keuffel & Esser Brick-O-Meter, Mackensen C. Co. Inc. Instructions 1938 USA Manual 0.0 Paper 0 0 0 0 MHF-702 MHF-D10 0
Keuffel & Esser Celcon Doric (68 1550) 1962 620214 USA Linear 12.5 Plastic 1 1 1 0 MHF-147 MHF-D4 0
Keuffel & Esser Celcon Doric (68 1550) 1972 USA Linear 12.5 Plastic 1 1 0 0 MHF-148 MHF-D4 0
Keuffel & Esser College and School Catalog 1955 USA Catalog 0.0 Paper 0 0 0 0 MHF-804 MHF-D19 0
Keuffel & Esser D Slide Rule Indicator 1922 USA Magnifier 0.0 Plastic 0 0 1 0 0
Keuffel & Esser D4053-3 Polyphase Mannheim Decitrig 1957 320464 USA Linear 25.0 Wood 0 1 0 0 MHF-071 MHF-D2 1
Keuffel & Esser D4053-3 Polyphase Mannheim Decitrig 1957 320221 USA Linear 25.0 Wood 0 1 0 0 MHF-072 MHF-D2 1
Keuffel & Esser D68 1617 Polyphase Mannheim Decitrig 1960 660040 USA Linear 25.0 Wood 0 1 1 0 MHF-123 MHF-D2 1
Keuffel & Esser D68 1617 Polyphase Mannheim Decitrig 1965 030078 USA Linear 25.0 Wood 0 1 0 0 MHF-073 MHF-D2 1
Keuffel & Esser EL Slide Rule Indicator 0 USA Magnifier 0.0 Plastic 0 0 1 1 0
Keuffel & Esser EL Slide Rule Indicator 0 USA Magnifier 0.0 Plastic 0 0 1 0 0
Keuffel & Esser EL Slide Rule Indicator 0 On 4041 TCL USA Magnifier 0.0 Plastic 0 0 1 0 0
Keuffel & Esser EL Slide Rule Indicator 0 On 4051 USA Magnifier 0.0 Plastic 0 0 1 0 0
Keuffel & Esser F 4236 Compensating Polar E 1954 48799 E 1647 USA Planimeter 217.8 Metal 0 0 1 0 MHF-484 MHF-D14 0
Keuffel & Esser Henning Pocket Recorder 0 15 USA Other 0.0 Metal 0 1 0 0 MHF-777 Bookcase-2 0
Keuffel & Esser I Slide Rule Indicator, Column Cursor in pieces 1913 from 4092 86 end USA Magnifier 0.0 Metal 1 0 1 1 ISRM ISRM 0
Keuffel & Esser IL Slide Rule Indicator 1932 In IL Box USA Magnifier 0.0 Plastic 1 0 1 0 0
Keuffel & Esser IL Slide Rule Indicator 1932 In IL Box USA Magnifier 0.0 Plastic 1 0 1 1 0
Keuffel & Esser IL Slide Rule Indicator, I Beam in pieces 1933 from 4092 86 end USA No Value 0.0 Plastic 1 0 1 0 0
Keuffel & Esser Instruction Manual Analon Eng-Sci Analy Slide Rule 1967 Analon Box USA Manual 0.0 Hard Cover 0 1 1 0 MHF-756 MHF-D6 0
Keuffel & Esser Instructions for using Thacher’s Calculating Instrument 1914 3980 USA Manual 0.0 Paper 0 0 1 0 MHF-820 Thacher Box 0
Keuffel & Esser Lumber Slide Rule 1900 1 end USA Special 50.0 Wood 0 1 0 0 MHF-803 MHF-D13 1
Keuffel & Esser N4041 Mannheim 1922 026576 USA Linear 25.0 Wood 0 1 0 0 MHF-017 MHF-D1 1
Keuffel & Esser N4041 Mannheim 1932 338516 USA Linear 25.0 Wood 0 1 0 0 MHF-018 MHF-D1 1
Keuffel & Esser N4041 Mannheim 1933 436830 USA Linear 25.0 Wood 0 1 0 0 MHF-020 MHF-D1 1
Keuffel & Esser N4041 Mannheim 1936 549701 USA Linear 25.0 Wood 0 1 0 0 MHF-019 MHF-D1 1
Keuffel & Esser N4053-2 Polyphase Mannheim 1922 57609 USA Linear 20.0 Wood 0 1 0 0 MHF-566 Display 0
Keuffel & Esser N4053-2 Polyphase Mannheim 1922 68048 USA Linear 20.0 Wood 0 1 0 0 MHF-050 MHF-D2 1
Keuffel & Esser N4053-3 Polyphase Mannheim 1927 211917 USA Linear 25.0 Wood 0 1 0 0 MHF-060 MHF-D2 1
Keuffel & Esser N4053-3 Polyphase Mannheim 1932 323979 USA Linear 25.0 Wood 0 0 0 1 MHF-101 MHF-D2 1
Keuffel & Esser N4053-3 Polyphase Mannheim 1933 386745 USA Linear 25.0 Wood 0 1 0 0 MHF-062 MHF-D2 1
Keuffel & Esser N4053-3 Polyphase Mannheim 1933 383058 USA Linear 25.0 Wood 0 1 0 0 MHF-063 MHF-D2 1
Keuffel & Esser N4053-3 Polyphase Mannheim 1933 350478 USA Linear 25.0 Wood 0 0 0 0 MHF-061 MHF-D2 1
Keuffel & Esser N4053-3 Polyphase Mannheim 1940 859366, John Keller USA Linear 25.0 Wood 0 1 1 0 MHF-122 MHF-D2 1
Keuffel & Esser N4053-3 Polyphase Mannheim 1940 802937 USA Linear 25.0 Wood 0 0 0 0 MHF-065 MHF-D2 1
Keuffel & Esser N4053-3 Polyphase Mannheim 1943 012841 USA Linear 25.0 Wood 0 1 0 0 MHF-066 MHF-D2 1
Keuffel & Esser N4053-3 Polyphase Mannheim 1944 19676/19728 USA Linear 25.0 Wood 0 0 0 1 MHF-102 MHF-D2 1
Keuffel & Esser N4053-3 Polyphase Mannheim 1944 043255 USA Linear 25.0 Wood 0 1 0 1 MHF-064 MHF-D2 1
Keuffel & Esser N4053-3 Polyphase Mannheim 1948 368511 USA Linear 25.0 Wood 0 1 0 1 MHF-100 MHF-D2 1
Keuffel & Esser N4053-3 Polyphase Mannheim 1952 753791 USA Linear 25.0 Wood 0 1 1 0 MHF-067 MHF-D2 1
Keuffel & Esser N4053-3F Polyphase Mannheim 1922 16355, 117 end USA Linear 25.0 Wood 0 1 0 0 MHF-068 MHF-D2 1
Keuffel & Esser N4053-5 Polyphase Mannheim 1931 355905 USA Linear 50.0 Wood 0 0 0 0 MHF-103 MHF-D11 0
Keuffel & Esser N4053-5 Polyphase Mannheim 1950 644999 USA Linear 50.0 Wood 1 0 0 0 MHF-104 MHF-D11 0
Keuffel & Esser N4053-5 Polyphase Mannheim 1950 651936 USA Linear 50.0 Wood 1 0 0 0 MHF-105 Display 0
Keuffel & Esser N4058W Mannheim Beginner's 1959 USA Linear 25.0 Wood 0 1 0 0 MHF-031 MHF-D1 1
Keuffel & Esser N4058W Mannheim Beginner's 1959 USA Linear 25.0 Wood 0 1 0 0 MHF-030 MHF-D1 1
Keuffel & Esser N4080-3 Log Log Trig 1947 469618 USA Linear 25.0 Wood 1 1 0 1 MHF-185 MHF-D5 0
Keuffel & Esser N4080-3 Log Log Trig 1950 625153 USA Linear 25.0 Wood 1 1 0 0 MHF-184 MHF-D5 0
Keuffel & Esser N4080-5 Log Log Trig 1946 669614 USA Linear 50.0 Wood 1 1 0 0 MHF-802 MHF-D7 0
Keuffel & Esser N4081-3 Log Log Decitrig 1949 491367 USA Linear 25.0 Wood 1 0 0 0 MHF-190 MHF-D6 0
Keuffel & Esser N4081-3 Log Log Decitrig 1949 519945 USA Linear 25.0 Wood 1 1 0 0 MHF-568 Display 0
Keuffel & Esser N4081-3 Log Log Decitrig 1951 716229 USA Linear 25.0 Wood 1 1 0 0 MHF-189 MHF-D6 0
Keuffel & Esser N4083-3 Log Log Vector 1951 738970 USA Linear 25.0 Wood 1 1 0 0 MHF-203 MHF-D6 0
Keuffel & Esser N4088-5 Polyphase 1944 170279 USA Linear 50.0 Wood 1 0 0 0 MHF-141 MHF-D11 0
Keuffel & Esser N4092-5 Log Log 1931 309988 USA Linear 50.0 Wood 1 0 0 0 MHF-206 MHF-D7 0
Keuffel & Esser N4092-5 Log Log 1934 468499 USA Linear 50.0 Wood 1 1 0 0 MHF-207 MHF-D7 0
Keuffel & Esser N4092-5 Log Log 1934 468477 USA Linear 50.0 Wood 1 1 0 0 MHF-208 MHF-D7 0
Keuffel & Esser N4095 Merchant's 1921 62 end USA Linear 25.0 Wood 1 1 0 0 MHF-236 MHF-D9 1
Keuffel & Esser N4096 Mannheim Merchant's 1950 698326 USA Linear 50.0 Wood 0 0 1 0 MHF-535 Top Flat Files 0
Keuffel & Esser N4096 Mannheim Merchant's 1960 629831 USA Linear 50.0 Wood 0 0 1 0 MHF-534 Top Flat Files 0
Keuffel & Esser N4096M Mannheim Merchant's 1953 896800 USA Linear 50.0 Wood 0 1 0 0 MHF-232 MHF-D9 0
Keuffel & Esser N4100 Mannheim Stadia 1954 768599 USA Linear 25.0 Wood 0 1 1 0 MHF-238 MHF-D9 0
Keuffel & Esser N4101 Mannheim Stadia 1942 964847 USA Linear 50.0 Wood 0 1 0 0 MHF-245 MHF-D9 0
Keuffel & Esser N4133 Mannheim Roy Lance Electrican's 1928 210019 USA Linear 20.0 Wood 0 1 0 0 MHF-255 MHF-D10 0
Keuffel & Esser N4133 Mannheim Roy Lance Electrican's 1947 415945 USA Linear 20.0 Wood 0 1 0 0 MHF-256 MHF-D10 0
Keuffel & Esser N4238 Compensating Polar E/M 1936 4576 Germany Planimeter 283.6 Metal 0 0 1 0 MHF-483 Cabinet 0
Keuffel & Esser N9081-3 Doric Log Log Decitrig 1951 43448 USA Linear 25.0 Plastic 1 1 0 0 MHF-193 MHF-D6 0
Keuffel & Esser N9081-3 Doric Log Log Decitrig 1954 17493 USA Linear 25.0 Plastic 1 1 0 0 MHF-194 MHF-D6 0
Keuffel & Esser National Union Radio 1937 USA Linear 25.0 Wood 0 1 0 0 MHF-259 MHF-D10 0
Keuffel & Esser National Union Radio 1937 USA Linear 25.0 Wood 0 1 0 0 ISRM ISRM 0
Keuffel & Esser PL Slide Rule Indicator 0 In PL Box USA Magnifier 0 Plastic 1 0 1 0 0
Keuffel & Esser PL Slide Rule Indicator 0 USA Magnifier 0 Plastic 1 0 1 0 0
Keuffel & Esser Reymond Leather Calculator 1926 F308 USA Special 50.0 Wood 0 1 0 0 MHF-546 MHF-D12 0
Keuffel & Esser S.P. 4055 Favorite Mannheim 1937 732632 USA Linear 25.0 Wood 0 1 0 1 MHF-809 MHF-D3 0
Keuffel & Esser Short Base Triangulation 1945 USA Linear 50.0 Wood 0 1 0 1 MHF-248 MHF-D13 0
Keuffel & Esser Table, Graphical Firing, M12 1943 USA Linear 40.2 Wood 0 1 0 0 MHF-471 MHF-D25 0
Keuffel & Esser Tie Clip Silver 0 USA Jewelry 4.0 Metal 0 0 0 0 MHF-644 MHF-Box1 0
Keuffel & Esser Tie Tack 0 USA Jewelry 2.5 Metal 0 0 1 0 MHF-646 MHF-Box1 0
Keuffel & Esser Tie Tack 0 USA Jewelry 2.5 Metal 0 0 1 0 MHF-645 MHF-Box1 0
Keuffel & Esser TimeSlide Calendar 1955 USA Special 29.5 Wood 1 0 0 0 MHF-598 MHF-D10 0
Keuffel & Esser Unknown In/A,DF-CF,CI,C-C,K/CM S(dms)BLT 1949 434542 USA Linear 25.0 Wood 0 1 0 0 MHF-081 MHF-D3 1
Keuffel & Esser / Acushnet Process Company Young’s Specific Gravity & Compound Cost Calculator 1913 50 End 31 Side USA Special 12.5 Wood 0 0 0 0 MHF-666 MHF-D13 1
Keuffel & Esser / ECCO CO. 10000 Doric Polyphase 1946 USA Linear 12.5 Plastic 1 1 0 1 MHF-142 MHF-D4 0
Keuffel & Esser Manual A Self Instruction Manual 1955 50007 USA Manual 0.0 Hard Cover 0 0 0 0 MHF-684 Bookcase 0
Keuffel & Esser Manual A slide rule with intellect and .. horse sense 1956 91264 USA Catalog 0.0 Paper 0 0 0 0 MHF-744 MHF-D19 0
Keuffel & Esser Manual Cooke Radio Slide Rule A Suppl. Man. 1942 11,65502. K&E 4139, SN 313895 USA Manual 0.0 Paper 0 0 0 0 MHF-742 MHF-D19 0
Keuffel & Esser Manual Deci-Lon An Instruction Manual 1962 52387 USA Manual 0.0 Hard Cover 0 0 0 0 MHF-687 Bookcase 0
Keuffel & Esser Manual Deci-Lon An Instruction Manual 1962 91008 USA Manual 0.0 Hard Cover 0 0 0 0 MHF-686 Bookcase 0
Keuffel & Esser Manual Decimal Equivalents of Fractions / Calendar 1948 USA Manual 0.0 Paper 0 0 0 0 MHF-748 MHF-D19 0
Keuffel & Esser Manual Educational Supplies & Equipment 1966 15189-115K-45 USA Catalog 0.0 Paper 0 0 0 0 MHF-679 MHF-D19 0
Keuffel & Esser Manual Elementary Instructions 1944 49124 USA Manual 0.0 Paper 0 0 0 0 MHF-727 MHF-D19 0
Keuffel & Esser Manual How to Choose a Slide Rule 1940 USA Catalog 0.0 Paper 0 0 0 0 MHF-743 MHF-D19 0
Keuffel & Esser Manual How To Take Care Of Your Slide Rule 1962 S14-5 3 copies USA Manual 0.0 Paper 0 0 0 0 MHF-745 MHF-D19 0
Keuffel & Esser Manual Inst for Oper Ever-There Slide Rule No. 4097C 1936 12,059. S, cc,, yay. HM. USA Manual 0.0 Paper 0 0 0 0 MHF-760 MHF-D19 0
Keuffel & Esser Manual Instructions for Use of Log Log Duplex Slide Rule 1922 5009. ki, i, kh. cM. USA Manual 0.0 Paper 0 0 0 0 MHF-728 MHF-D19 0
Keuffel & Esser Manual Jetlog and Decitrig An Instruction Manual 1955 41604 USA Manual 0.0 Hard Cover 0 0 0 0 MHF-685 Bookcase 0
Keuffel & Esser Manual K & E Catalog 34th Edition 1913 L A Struigfield, Corning Cal USA Catalog 0.0 Hard Cover 0 0 0 0 MHF-669 Bookcase 0
Keuffel & Esser Manual K & E Catalog 35th Edition 1915 The Dodd Co USA Catalog 0.0 Hard Cover 0 0 0 0 MHF-670 Bookcase 0
Keuffel & Esser Manual K & E Catalog 36th Edition 1921 USA Catalog 0.0 Hard Cover 0 0 0 0 MHF-671 Bookcase 0
Keuffel & Esser Manual K & E Catalog 37th Edition 1927 Emile Tomlin USA Catalog 0.0 Hard Cover 0 0 0 0 MHF-672 Bookcase 0
Keuffel & Esser Manual K & E Catalog 37th Edition 1927 USA Catalog 0.0 Hard Cover 0 0 0 0 MHF-799 Bookcase 0
Keuffel & Esser Manual K & E Catalog 38th Edition 1936 K. C. Fuller USA Catalog 0.0 Hard Cover 0 0 0 0 MHF-673 Bookcase 0
Keuffel & Esser Manual K & E Catalog 39th Interim Ed War Catalog 1943 R. W. Phipps USA Catalog 0.0 Hard Cover 0 0 0 0 MHF-674 Bookcase 0
Keuffel & Esser Manual K & E Catalog 40th Edition 1944 Copy No. 37075 USA Catalog 0.0 Hard Cover 0 0 0 0 MHF-675 Bookcase 0
Keuffel & Esser Manual K & E Catalog 42nd Edition 1954 Wm. C. Spinck, K&E Sales USA Catalog 0.0 Hard Cover 0 0 0 0 MHF-676 Bookcase 0
Keuffel & Esser Manual K & E Catalog 42nd Edition, Part 1 1954 Schaeffer, Hooton & Wilson USA Catalog 0.0 Paper 0 0 0 0 MHF-677 Bookcase 0
Keuffel & Esser Manual K & E Catalog 43rd Edition, section Slide Rules Catalog 8 1962 USA Catalog 0.0 Paper 0 0 0 0 MHF-678 MHF-D19 0
Keuffel & Esser Manual K & E Price List, 37th Edition 1928 USA Catalog 0.0 Paper 0 0 0 0 MHF-703 MHF-D19 0
Keuffel & Esser Manual K & E Price List, 42nd Edition 1959 38478 USA Catalog 0.0 Paper 0 0 0 0 MHF-680 MHF-D19 0
Keuffel & Esser Manual Learning to Use the Slide Rule 1961 S24 USA Manual 0.0 Paper 0 0 0 0 MHF-764 MHF-D19 0
Keuffel & Esser Manual Learning to Use the Slide Rule 1961 S24-2 USA Manual 0.0 Paper 0 0 0 1 MHF-763 MHF-D19 0
Keuffel & Esser Manual Log Log Duplex Decitrig No. 4081 1942 7724 USA Manual 0.0 Paper 0 0 0 0 MHF-714 MHF-D19 0
Keuffel & Esser Manual Log Log Duplex Decitrig No. 4081 1945 12,473. USA Manual 0.0 Paper 0 0 0 0 MHF-708 MHF-D19 0
Keuffel & Esser Manual Log Log Duplex Decitrig No. 4081 1955 USA Manual 0.0 Paper 0 0 0 0 MHF-710 MHF-D19 0
Keuffel & Esser Manual Log Log Duplex Decitrig No. 4081 1955 2310 USA Manual 0.0 Paper 0 0 0 0 MHF-709 MHF-D19 0
Keuffel & Esser Manual Log Log Duplex Decitrig No. 4081 1955 72536 see K&E 4181-3 015574 USA Manual 0.0 Paper 0 0 0 0 MHF-711 MHF-D19 0
Keuffel & Esser Manual Log Log Duplex Decitrig No. 68 2047 1955 66992 in 68 1251 box USA Manual 0.0 Paper 0 0 0 0 MHF-755 MHF-D6 0
Keuffel & Esser Manual Log Log Duplex Decitrig No. 68 2047 1955 45670 USA Manual 0.0 Paper 0 0 0 0 MHF-713 MHF-D19 0
Keuffel & Esser Manual Log Log Duplex Decitrig No. 68 2047 1955 29244 USA Manual 0.0 Paper 0 0 0 0 MHF-724 MHF-D19 0
Keuffel & Esser Manual Log Log Duplex Decitrig No. N4081 1947 USA Manual 0.0 Paper 0 0 0 0 MHF-712 MHF-D19 0
Keuffel & Esser Manual Log Log Duplex Slide Rule 1926 USA Manual 0.0 Paper 0 0 0 1 MHF-704 MHF-D19 0
Keuffel & Esser Manual Log Log Duplex Slide Rule 1926 USA Manual 0.0 Paper 0 0 0 0 MHF-705 MHF-D19 0
Keuffel & Esser Manual Log Log Duplex Trig N4080-3 1948 94542 USA Manual 0.0 Paper 0 0 0 0 MHF-707 MHF-D19 0
Keuffel & Esser Manual Log Log Duplex Trig No. 4080 1943 41097 USA Manual 0.0 Paper 0 0 0 0 MHF-706 MHF-D19 0
Keuffel & Esser Manual Log Log Duplex Vector No. N4083 1939 34204+Suppl & SRT Scale USA Manual 0.0 Paper 0 0 0 0 MHF-726 MHF-D19 0
Keuffel & Esser Manual Log Log Vector Slide Rule 1930 USA Manual 0.0 Paper 0 0 0 0 MHF-725 MHF-D19 0
Keuffel & Esser Manual Merchants’ Pocket Slide Rule Instructions Manual No, 68 1791 1950 13215 USA Manual 0.0 Paper 0 0 0 0 MHF-762 MHF-D19 0
Keuffel & Esser Manual Merchants’ Slide Rule 68 1775 1960 23096-36C-1.5 USA Manual 0.0 Paper 0 0 0 0 MHF-759 MHF-D19 0
Keuffel & Esser Manual Modern Polyphase No. 68 2061 Old 4187Y 1952 29872 USA Manual 0.0 Paper 0 0 0 0 MHF-739 MHF-D19 0
Keuffel & Esser Manual Pocket Slide Rule 4150-1 (Formerly 9050-1) Instructions 1950 34161 USA Manual 0.0 Paper 0 0 0 0 MHF-761 MHF-D19 0
Keuffel & Esser Manual Pocket Slide Rule 4150-1 Instructions 1950 63895 USA Manual 0.0 Paper 0 0 0 0 MHF-758 MHF-D19 0
Keuffel & Esser Manual Pocket Slide Rules - Brochure 1962 USA Manual 0.0 Paper 0 0 0 0 MHF-747 MHF-D19 0
Keuffel & Esser Manual Pocket Slide Rules - Brochure 1964 USA Manual 0.0 Paper 0 0 0 0 MHF-746 MHF-D19 0
Keuffel & Esser Manual Polyphase Duplex Decitrig No. 4071 1939 7241 USA Manual 0.0 Paper 0 0 0 0 MHF-721 MHF-D19 0
Keuffel & Esser Manual Polyphase Duplex Decitrig No. 4071 1939 7241 USA Manual 0.0 Paper 0 0 0 0 MHF-720 MHF-D19 0
Keuffel & Esser Manual Polyphase Duplex Decitrig No. 68 2055 Old No. 4187U 1962 7751 USA Manual 0.0 Paper 0 0 0 0 MHF-719 MHF-D19 0
Keuffel & Esser Manual Polyphase Duplex Decitrig No. 68 2059 Old No. 4187X 1947 USA Manual 0.0 Paper 0 0 0 0 MHF-722 MHF-D19 0
Keuffel & Esser Manual Polyphase No. 68 2063 Old 4187H 1954 41671 USA Manual 0.0 Paper 0 0 0 0 MHF-740 MHF-D19 0
Keuffel & Esser Manual Polyphase Slide Rule No. N4053 1944 60247 2ed USA Manual 0.0 Paper 0 0 0 0 MHF-738 MHF-D19 0
Keuffel & Esser Manual Polyphase-Duplex Slide Rule 1913 1023. k, x, ca. h M. USA Manual 0.0 Paper 0 0 0 0 MHF-715 MHF-D19 0
Keuffel & Esser Manual Slide Rules & Calculating Instruments 1913 1030.ck. x, ca. sM USA Catalog 0.0 Paper 0 0 0 0 MHF-682 MHF-D19 0
Keuffel & Esser Manual Slide Rules & Calculating Instruments 1930 4653-3 o,cc, ki, hM. USA Catalog 0.0 Paper 0 0 0 0 MHF-681 MHF-D19 0
Keuffel & Esser Manual Slide Rules & Calculating Instruments 1942 93034 USA Catalog 0.0 Paper 0 0 0 0 MHF-683 MHF-D19 0
Keuffel & Esser Manual Suppl. Man. Cooke Radio No 4139 1942 USA Manual 0.0 Paper 0 0 0 0 MHF-741 MHF-D19 0
Keuffel & Esser Manual The Ever-There Slide Rule No. 4097D 1947 12644 USA Manual 0.0 Paper 0 0 0 0 MHF-724 MHF-D19 0
Keuffel & Esser Manual The Mannheim & Polyphase Slide Rules 1920 2465. cc,h,ks. sM. USA Manual 0.0 Paper 0 0 0 0 MHF-734 MHF-D19 0
Keuffel & Esser Manual The Mannheim & Polyphase Slide Rules 1922 3158. a, y, kk. hM. USA Manual 0.0 Paper 0 0 0 0 MHF-733 MHF-D19 0
Keuffel & Esser Manual The Mannheim and The Duplex Slide Rules 1909 965, h. c c. k. aM. El USA Manual 0.0 Paper 0 0 0 0 MHF-717 MHF-D19 0
Keuffel & Esser Manual The Mannheim and The Duplex Slide Rules 1909 965, h. c c. k. aM. El USA Manual 0.0 Paper 0 0 0 0 MHF-716 MHF-D19 0
Keuffel & Esser Manual The Mannheim Slide Rule 1938 43343 USA Manual 0.0 Paper 0 0 0 0 MHF-735 MHF-D19 0
Keuffel & Esser Manual The Mannheim Slide Rule Complete Manual 1903 540-Ks-x-sy-hME., ed Chamberlain USA Manual 0.0 Paper 0 0 0 0 MHF-730 MHF-D19 0
Keuffel & Esser Manual The Mannheim Slide Rule Complete Manual 1917 1608. s, a, cm. sM. USA Manual 0.0 Paper 0 0 0 0 MHF-732 MHF-D19 0
Keuffel & Esser Manual The Mannheim Slide Rule Complete Manual 1917 1885. ch, o, co. sM. USA Manual 0.0 Paper 0 0 0 0 MHF-729 MHF-D19 0
Keuffel & Esser Manual The Mannheim Slide Rule Complete Manual 1917 1416. k, k, cx. sM. USA Manual 0.0 Paper 0 0 0 0 MHF-731 MHF-D19 0
Keuffel & Esser Manual The Polar Planimeter 1915 1276. i, a, ch. cM. USA Manual 0.0 Paper 0 0 0 0 MHF-726 MHF-D19 0
Keuffel & Esser Manual The Polyphase Duplex Slide Rule No. 4088 1938 60267-1940 SR 4088-3 382044 USA Manual 0.0 Paper 0 0 0 0 MHF-718 MHF-D19 0
Keuffel & Esser Manual The Polyphase Slide Rule No. N4053 1944 6391 USA Manual 0.0 Paper 0 0 0 0 MHF-737 MHF-D19 0
Keuffel & Esser Manual The SRT Scale 1955 USA Manual 0.0 Paper 0 0 0 0 MHF-757 MHF-D19 0
Kolesch & Co. Midget 1924 USA Linear 12.5 Wood 0 0 0 0 MHF-375 MHF-D20 0
Kontrolpribor KL-1 1966 USSR Circular 3.5 Metal 0 0 1 0 MHF-270 Cabinet 0
Kontrolpribor KL-1 JUBILEUM 1967 1967 USSR Circular 3.5 Metal 0 0 0 1 MHF-269 Cabinet 0
Lafayette 99-71029 VectorLog 1961 SS-2 Japan Linear 25.0 Wood 1 1 0 0 MHF-389 MHF-D23 0
Lafayette F-428 Log Log Duplex Deci-Trig 1961 K.S-3 Japan Linear 25.0 Wood 1 1 0 0 MHF-388 MHF-D23 0
Lawrence Engineering 10-B 0 USA Linear 25.0 Wood 0 0 0 0 MHF-333 MHF-D22 0
Lawrence Engineering 10-B 1940 USA Linear 25.0 Wood 0 0 0 0 MHF-578 Display 0
Lawrence Engineering 10-D Eureka Millwork Lumber Calculator 0 USA Special 24.7 Wood 0 0 0 0 MHF-337 MHF-D22 0
Lawrence Engineering 10-D Lawrence Lumber Calculator 0 USA Special 24.7 Wood 0 0 1 0 MHF-336 MHF-D22 0
Lawrence Engineering 409 U. S. Navy 0 USA Linear 25.0 Wood 0 0 0 0 MHF-340 MHF-D22 0
Lawrence Engineering 8-B 0 USA Linear 19.0 Wood 0 0 0 1 MHF-331 MHF-D22 0
Lawrence Engineering 8-B 1937 USA Linear 19.0 Wood 0 0 1 0 MHF-332 MHF-D22 0
Lawrence Engineering 8-L Copper Wire Selector 1946 USA Special 16.5 Wood 0 1 0 0 MHF-338 MHF-D22 0
Lawrence Engineering B. F. Grizzle Instructions for Water Line Capacity Slide Rule 1944 USA Manual 19.5 Paper 0 0 0 0 MHF-754 MHF-D22 0
Lawrence Engineering B.F. Grizzle Water Line Capacity 1944 USA Special 19.5 Wood 0 1 0 0 MHF-339 MHF-D22 0
Lawrence Engineering DeYOE Slide Rule 0 USA Special 25.0 Wood 0 0 1 0 MHF-344 MHF-D22 0
Lawrence Engineering Epperson TV Coverage Calculator 1952 USA Special 24.0 Wood 0 0 0 0 MHF-343 MHF-D22 0
Lawrence Engineering Madison Speed Calculator 1947 USA Special 17.8 Wood 0 0 0 0 MHF-342 MHF-D22 0
Lawrence Engineering US Aviation Underwriters, Inc. 1944 USA Linear 29.3 Wood 0 0 0 0 David Rance David Rance 0
Lawrence Engineering Service Lawrence “Secret Code” Rule 1939 USA Special 18.0 Wood 0 0 0 0 MHF-485 MHF-D22 0
Lightning Adding Machine 0 USA Addometer 20.0 Metal 0 0 1 0 MHF-479 MHF-D25 0
Lutz 252 U.S. 1964 ss-9 Japan Linear 25.0 Wood 1 1 0 0 MHF-393 MHF-D23 0
M. H. Mear Gas Flow Calculator Model 3 0 UK Special 19.5 Plastic 0 1 0 0 MHF-526 MHF-D18 0
Maurice Damien Universal Ruler (Regle A Calculus) 1930 France Linear 25.0 Metal 0 1 0 0 MHF-625 MHF-D23 0
Merchant Account Simplex 0 11978 USA Adding Machine 0.0 Metal 0 1 0 0 MHF-773 Workshop 0
Monroe Calculator Model K 1925 USA Adding Machine 0.0 Metal 0 0 0 0 MHF-770 Workshop 0
Monroe Manufacturing Co. Monroe Slide Rule Pencil 0 USA Jewelry 7.4 Metal 0 0 1 0 MHF-647 MHF-Box1 0
Moonstick Co. Moonstick 2001 USA Special 0.0 Plastic 0 0 1 0 MHF-461 MHF-D25 0
Novotni Feed Slide Rule 1955 USA Special 25.5 Wood 0 0 1 0 MHF-446 MHF-D24 0
Novotni Novotni Weight Rule 0 USA Special 33.5 Plastic 0 0 0 0 MHF-421 MHF-D24 0
Novotni Paper Box Board Rule 0 USA Special 16.0 Wood 0 0 0 0 MHF-424 MHF-D24 0
Novotni Novotni Weight Slide Rule 1920 USA Special 33.5 Plastic 0 0 0 0 MHF-422 MHF-D24 0
Ohio State University Slide Rule Manual 1947 USA Manual 0.0 Paper 0 0 0 0 MHF-749 MHF-D19 0
Otis-King K 423/414 1970 X4113 UK Cylindrical 26.0 Metal 0 0 1 0 MHF-528 MHF-D9 0
Otis-King L 430/429 1923 A8302 UK Cylindrical 0.0 Metal 0 0 0 0 MHF-529 Cabinet 0
Otis-King L 430/429 1957 S6877 UK Cylindrical 26.0 Metal 0 1 1 0 MHF-531 Cabinet 0
Otis-King L 430/429 1969 T1415 UK Cylindrical 26.0 Metal 0 0 1 0 MHF-537 MHF-D9 0
Otis-King L 430/429 1974 B1230 UK Cylindrical 26.0 Metal 0 0 1 0 MHF-530 MHF-D9 0
P.I.C. / A. G. Thornton Ltd. 131 Electro 0 UK Linear 25.0 Wood 0 1 0 1 MHF-398 MHF-D23 0
P.I.C. / A. G. Thornton Ltd. 172 /PC17 0 UK Linear 25.0 Wood 0 0 0 1 MHF-616 MHF-D23 0
Perrygraf Corp. Doty Scientific Vector Impedance Calculator 1971 USA Special 21.0 Paper 0 0 0 0 MHF-632 MHF-D24 0
Perrygraf Corp. Hewlett-Packard Packard Vector Impedance Calculator 1966 7 each USA Special 21.0 Paper 0 0 0 0 MHF-429 MHF-D24 0
Perrygraf Corp. Varian NMR Correlator 1973 USA Special 21.0 Paper 0 0 0 0 MHF-633 MHF-D24 0
Pery Graf Corp. Roebling "Traction Steel" Elevator Rope Calculator 1944 USA Special 24.0 Paper 0 1 0 0 MHF-448 MHF-D24 0
Pickett 1000 Ortho-Phase 1950 Milo Frey USA Linear 25.0 Metal 1 0 0 0 MHF-313 MHF-D21 0
Pickett 101C Dial Rule 1975 NOS USA Circular 10.2 Metal 0 1 0 0 MHF-325 MHF-D22 0
Pickett 103-ES Mark-Up Calculator 1975 NOS USA Circular 10.2 Metal 0 1 0 0 MHF-326 MHF-D22 0
Pickett 108ES 1975 Japan Circular 8.0 Metal 1 1 0 0 MHF-327 MHF-D22 0
Pickett 112C Metric Converter - Liquid 1975 x2 USA Circular 15.2 Plastic 0 0 0 0 MHF-330 MHF-D22 0
Pickett 112C Metric Converter - Liquid 1975 x2 USA Circular 15.2 Plastic 0 0 0 0 MHF-329 MHF-D22 0
Pickett 112C Metric Converter - Weight 1975 USA Circular 15.2 Plastic 0 0 0 0 MHF-328 MHF-D22 0
Pickett 120 Simplex 1962 USA Linear 25.0 Plastic 0 1 0 0 MHF-299 MHF-D21 0
Pickett 120 Simplex 1962 USA Linear 25.0 Plastic 0 0 1 0 MHF-300 MHF-D21 0
Pickett 121 Microline 1970 USA Linear 25.0 Plastic 0 1 0 0 MHF-301 MHF-D21 0
Pickett 14 U.S. Military Slide Rule 1962 USA Linear 25.0 Metal 1 1 0 0 MHF-467 MHF-D25 0
Pickett 14 U.S. Military Slide Rule 1962 USA Linear 25.0 Metal 1 1 0 0 MHF-811 MHF-D25 0
Pickett 140 Microline 1975 Mexico Linear 25.0 Plastic 1 1 0 0 MHF-302 MHF-D21 0
Pickett 160 Microline 1975 USA Linear 12.5 Plastic 0 0 0 0 MHF-286 MHF-D21 0
Pickett 160C-T Microline 1975 Mexico Linear 12.5 Plastic 0 1 1 0 MHF-295 MHF-D21 0
Pickett 2 Deci Log Log 1950 17133 USA Linear 25.0 Metal 1 1 0 0 MHF-315 MHF-D21 0
Pickett 20 Basic 1955 USA Linear 12.5 Metal 0 1 1 0 MHF-297 MHF-D21 0
Pickett 200 Trig 1953 38 National Carbon Company USA Linear 12.5 Metal 1 1 0 0 MHF-287 MHF-D21 0
Pickett 200 Trig 1959 39 Slide USA Linear 12.5 Metal 1 1 0 0 MHF-288 MHF-D21 0
Pickett 300 Log 1952 42 Slide USA Linear 12.5 Metal 1 0 0 0 ISRM ISRM 0
Pickett 300 Log 1955 42 Z Slide USA Linear 12.5 Metal 1 1 0 0 MHF-292 MHF-D21 0
Pickett 4 Deci Log Log 1950 USA Linear 25.0 Metal 0 1 0 0 MHF-317 MHF-D21 0
Pickett 61 Promotional Midlan-Ross Corporation 1957 USA Linear 12.5 Paper 0 1 0 0 MHF-285 MHF-D21 0
Pickett 700 U. S. Air Force Aerial Photo Slide Rule Type A-2 1954 59 USA Linear 12.5 Metal 0 1 0 0 MHF-293 MHF-D21 0
Pickett 800-T Log Log 1969 USA Linear 25.0 Metal 0 1 0 0 MHF-602 MHF-D21 0
Pickett 901 Simplex 1955 20 USA Linear 25.0 Metal 0 1 0 0 MHF-603 MHF-D21 0
Pickett 902-T Simplex Trig 1955 39/41 Slide USA Linear 25.0 Metal 0 1 0 0 MHF-307 MHF-D21 0
Pickett 902-T Simplex Trig 1958 39/41 USA Linear 25.0 Metal 0 1 0 0 MHF-308 MHF-D21 0
Pickett 902-T Simplex Trig 1966 USA Linear 25.0 Metal 0 1 0 0 MHF-309 MHF-D21 0
Pickett 903-T Pickett-Trig Conversion 1957 47 USA Linear 25.0 Metal 0 1 0 0 MHF-604 MHF-D21 0
Pickett 905-ES "A" Texas Speed Rule 1962 119 USA Linear 25.0 Metal 1 1 0 0 MHF-312 MHF-D21 0
Pickett 905-ES "A" Texas Speed Rule 1962 119 USA Linear 25.0 Metal 1 1 1 0 MHF-324 MHF-D21 0
Pickett N1010-ES Trig 1960 USA Linear 25.0 Metal 1 1 0 0 MHF-314 MHF-D21 0
Pickett N1010-ES Trig 1975 USA Linear 25.0 Metal 1 1 0 0 MHF-605 MHF-D21 0
Pickett N1010-ES Trig Demonstration 1964 USA Linear 100.0 Wood 1 0 0 0 MHF-606 Shop Wall 0
Pickett N1010-T Trig 1966 945239 USA Linear 25.0 Metal 1 1 1 0 MHF-321 MHF-D21 0
Pickett N1050 Fuller Traffic Rule 1975 Mexico Linear 25.0 Metal 1 1 0 0 ISRM ISRM 0
Pickett N200-ES Trig 1975 USA Linear 12.5 Metal 1 1 0 0 MHF-601 MHF-D21 0
Pickett N200-ES Trig 1975 USA Linear 12.5 Metal 1 1 0 0 MHF-290 MHF-D21 0
Pickett N200-T Trig 1961 38 USA Linear 12.6 Metal 1 1 0 0 MHF-289 MHF-D21 0
Pickett N3-ES Power Log Exponential 1975 USA Linear 25.0 Metal 1 1 0 1 MHF-316 MHF-D21 0
Pickett N300-ES Log Log 1962 PT 2 Rule Pack USA Linear 12.5 Metal 1 1 1 0 MHF-323 MHF-D21 0
Pickett N3P-ES Power Log Exponential 1966 USA Linear 12.5 Wood 1 1 0 0 MHF-294 MHF-D21 0
Pickett N4-ES Vector-Type LOG LOG 1962 74 272 USA Linear 25.0 Metal 1 1 0 0 MHF-319 MHF-D21 0
Pickett N4-ES Vector-Type LOG LOG 1964 USA Linear 25.0 Metal 1 1 0 0 MHF-318 MHF-D21 0
Pickett N4-T Vector-Type LOG LOG 1964 USA Linear 25.0 Metal 1 1 0 0 MHF-600 MHF-D21 0
Pickett N4P-ES Vector-Type Log Log 1966 USA Linear 12.5 Wood 1 1 1 0 MHF-599 MHF-D21 0
Pickett N500-ES HI Log/Log 1962 PT 2 Rule pack USA Linear 25.0 Metal 1 1 1 0 MHF-322 MHF-D21 0
Pickett N500-ES HI Log/Log 1964 C1962 USA Linear 25.0 Wood 1 1 0 0 MHF-303 MHF-D21 0
Pickett N515-T Electronic 1962 349 USA Linear 25.0 Metal 0 1 0 0 MHF-305 MHF-D21 0
Pickett N515-T Electronic 1966 USA Linear 25.0 Metal 0 1 0 0 MHF-304 MHF-D21 0
Pickett N600-ES Log Log Speed Rule 1975 Paul LaFortune USA Linear 12.5 Metal 1 1 0 0 MHF-788 MHF-D21 0
Pickett N600-ES Log Log Speed Rule 1975 USA Linear 12.5 Metal 1 1 1 0 MHF-296 MHF-D21 0
Pickett N901-ES Simplex 1960 65 USA Linear 25.0 Metal 0 1 0 0 MHF-306 MHF-D21 0
Pickett N902-ES Simplex Trig 1959 39/41 Slide USA Linear 25.0 Metal 0 1 0 0 MHF-311 MHF-D21 0
Pickett N902-ES Simplex Trig 1960 66/41 Slide USA Linear 25.0 Metal 0 1 0 0 MHF-310 MHF-D21 0
Pickett N904-ES Trig & Decimal Keeper Speed Rule 1962 66/123 75888 USA Linear 25.0 Metal 1 1 1 0 MHF-320 MHF-D21 0
Pickett Trig, Training(120) 1962 USA Linear 25.0 Plastic 0 1 0 0 MHF-298 MHF-D21 0
Pickett Manual Electronics and Your Slide Rule Pt I - IV 1965 3132 to 3135 USA Manual 0.0 Plastic 0 0 0 0 MHF-695 MHF-D22 0
Pickett Manual How to use Dual Base Slide Rule Exponential Ln-L Scales 1959 M-21 USA Manual 0.0 Paper 0 0 0 0 MHF-690 MHF-D22 0
Pickett Manual How to use Log Log Slide Rules 1960 Pull-3 USA Manual 0.0 Paper 0 0 0 0 MHF-694 MHF-D22 0
Pickett Manual How To Use the Model 1000 Slide Rule 1948 USA Manual 0.0 Paper 0 0 0 0 MHF-689 MHF-D22 0
Pickett Manual How to use the TRIG Pickett Slide Rule 1952 USA Manual 0.0 Paper 0 0 0 0 MHF-692 MHF-D22 0
Pickett Manual How to use Trig Slide Rules 1960 MT-2 USA Manual 0.0 Paper 0 0 0 0 MHF-765 MHF-D22 0
Pickett Manual How to use Trig Slide Rules 1960 M-12 R USA Manual 0.0 Paper 0 0 0 1 MHF-691 MHF-D22 0
Pickett Manual How to use Trig Slide Rules 1960 M-12 R USA Manual 0.0 Paper 0 0 0 0 MHF-693 MHF-D22 0
Pickett Manual Model 2 0 USA Manual 0.0 Paper 0 0 0 1 MHF-751 MHF-D19 0
Pratt & Whitney Aircraft - Perrygraf Gas Turbine Computer 1957 USA Special 12.7 Plastic 0 1 0 0 MHF-524 MHF-D18 0
Publications Department - Raritan Arsenal TM 9-526 Technical Manual Graphical Firing Tables 1943 RAPD13DEC43-95M USA Manual 0.0 Paper 0 0 0 0 MHF-699 MHF-D25 0
Puregas Equipment Corp. Gas Pressurization Computer PEC 531 0 USA Special 25.0 Plastic 0 1 0 0 MHF-437 MHF-D24 0
Radiac & Nuclear Yield ABC-M1A1 & ABC-M4A1 1990 USA Special 10.0 Plastic 0 1 0 0 MHF-512 MHF-D17 0
Rand Drill Company Cox's Compressed-Air Discharge / Pump Computer 1897 USA Special 11.0 Paper 0 0 0 1 MHF-491 MHF-D16 1
Random Research, Inc. Harvard Logarithmic Selector 1973 USA Special 12.7 Plastic 0 0 0 0 MHF-514 MHF-D16 0
Ray E. Dennis Graphics En. Dr. 3260 Rle No. 4, t=U^1.3M 1948 Handmade USA Special 31.0 Wood 0 0 0 0 MHF-460 MHF-D25 0
RCA Satellite Location Chart 0 USA Special 22.0 Plastic 1 0 0 1 MHF-462 MHF-D25 0
Regal Precision The Regal Presision Calaulator Profit 0 USA Special 15.0 Metal 0 0 0 0 MHF-458 MHF-D24 0
Relay DCB-517 1954 CS-3 Japan Linear 12.5 Wood 1 1 0 0 MHF-612 MHF-D23 0
Reliable Typewriter & Adding Machine Co. Addometer 0 USA Addometer 29.0 Metal 0 0 1 0 MHF-477 MHF-D25 0
Reliable Typewriter & Adding Machine Co. Addometer B 0 USA Addometer 29.0 Metal 0 1 0 0 MHF-478 MHF-D25 0
Reo Motor Car Company Truck Performance Slide Rule 1933 USA Special 20.2 Plastic 0 1 0 0 MHF-449 MHF-D24 0
Roncari Industries Concrete Volume Calculator 0 USA No Value 12.5 Plastic 0 0 0 0 MHF-453 MHF-D24 0
Royal Dutch Engineering Works Pipe & pump 0 Holland Special 12.0 Plastic 0 1 0 0 MHF-519 MHF-D16 0
S.R. & S.E. Co. Inc Bituminous-Mix Slide Rule 1944 USA Special 30.4 Wood 0 0 0 0 MHF-439 MHF-D24 0
Sama & Etani 600 Hewitt-Robins 1969 Japan Circular 6.0 Plastic 0 1 0 0 MHF-498 MHF-D16 0
Sama & Etani 600 Michael O'Leary Memorial Edition 2003 Japan Circular 6.0 Plastic 0 1 0 0 MHF-499 MHF-D16 0
Sama & Etani 600-OP Projection 1969 Japan Circular 13.0 Plastic 0 1 0 0 MHF-500 MHF-D16 0
Sans & Streiffe 311 0 J.S-2 Japan Linear 25.0 Wood 0 1 0 0 MHF-394 MHF-D23 0
Schall & Son Slide Rule for calculating X Ray Exposures 1912 UK Special 25.7 Wood 0 0 0 0 MHF-442 MHF-D24 0
Schick Incorporated Stadimeter 1943 3501-1943 USA Other 0.0 Metal 0 1 0 0 MHF-776 Bookcase-2 0
Schuykill Paper Co. Paper Slide Rule 0 USA Special 35.5 Wood 0 0 0 0 MHF-426 MHF-D24 0
Scientific Instruments Co. 1610-D 1963 Japan Circular 11.7 Metal 1 1 0 0 MHF-507 MHF-D16 0
Sears, Roebuck and Co. Merchant's Calculator 1946 USA Linear 28.6 Wood 0 0 0 0 MHF-377 MHF-D20 0
Slide Chart Corp. Fan & Blower RPM Change Converter 1976 USA Circular 15.5 Paper 0 0 0 0 MHF-525 MHF-D18 0
Slide Rule & Scale Eng. Co. Brick & Tile Computing 0 USA Linear 29.8 Wood 0 0 0 0 MHF-455 MHF-D24 0
Sports Car Press A Guide to Rallying 1957 Larry Reid USA Manual 0.0 Paper 0 0 0 0 MHF-510 MHF-D17 0
Stanley Fuller Fuller Spiral Slide Rule 1945 4893 21 UK Cylindrical 30.0 Wood 0 0 1 0 MHF-821 Top Flat Files 0
Sterling 565 Automatic Adding Machine 0 USA Addometer 20.0 Plastic 0 0 0 0 MHF-473 MHF-D25 0
Sterling 587 0 USA Linear 12.5 Plastic 0 1 0 0 MHF-576 Display 0
Sterling 594 Decimal Trig Log-Log 1965 PS USA Linear 25.0 Plastic 1 1 0 0 MHF-374 MHF-D20 0
Sterling 594 Decimal Trig Log-Log 1965 USA Linear 25.0 Plastic 1 1 0 0 MHF-581 Display 0
Sterling 594 Decimal Trig Log-Log 1972 USA Linear 25.0 Plastic 1 1 0 0 MHF-373 MHF-D20 0
Sterling 684 Precision 0 USA Linear 25.0 Plastic 0 0 0 0 MHF-369 MHF-D20 0
Sterling 685 Precision 0 USA Linear 25.0 Plastic 0 1 0 0 MHF-370 MHF-D20 0
Sterling 685 Precision 1971 MHF USA Linear 25.0 Plastic 0 0 0 0 MHF-371 MHF-D20 0
Sterling 685Precision 0 USA Linear 25.0 Plastic 0 1 0 1 MHF-372 MHF-D20 0
Stevens Engineering Company Rally Indicator 1959 USA Special 15.0 Plastic 0 1 0 0 MHF-509 MHF-D17 0
Stevens Engineering Company Rally Indicator Model 25 1959 USA Special 23.0 Plastic 0 1 0 0 MHF-508 MHF-D17 0
Sun Hemmi 4" in/A-BC-D/cm SLT 0 Japan Linear 10.0 Wood 0 1 0 0 MHF-380 MHF-D23 0
Swank Money Clip 0 USA Jewelry 3.6 Plastic 0 0 0 0 MHF-648 MHF-Box1 0
Swank Tie Clip 0 USA Jewelry 4.1 Metal 0 0 0 0 MHF-650 MHF-Box1 0
Swank Tie Clip 0 USA Jewelry 4.1 Plastic 0 0 0 1 MHF-652 MHF-Box1 0
Swank Tie Clip 0 USA Jewelry 3.6 Plastic 0 0 0 0 MHF-651 MHF-Box1 0
Swank Tie Clip 0 USA Jewelry 4.1 Metal 0 0 1 0 MHF-649 MHF-Box1 0
Sylvania Flash Film Pencil 0 USA Jewelry 14.0 Plastic 0 0 0 0 MHF-653 MHF-Box1 0
Taisho Kogyo 101 Patent 525597 0 Japan Special 12.5 Plastic 0 1 0 0 MHF-822 0
Tavernier-Gravet 11-22 Péraux rule 1939 34 / 32 End France Linear 25.0 Wood 0 1 0 1 Sold Sold 0
Tavernier-Gravet 12-11 1900 France Linear 25.0 Plastic 0 1 0 1 MHF-808 MHF-D22 1
Tavernier-Gravet 14 G. Barriere 0 France Linear 25.0 Plastic 0 1 0 0 MHF-783 MHF-D22 1
Tavernier-Gravet 18 Dual Slide 1925 6-25 France Linear 25.0 Wood 0 1 0 0 MHF-782 MHF-D22 1
Tavernier-Gravet Medailles D’ur 45/8 1900 France Linear 25.0 Plastic 0 1 0 0 MHF-807 MHF-D22 1
Teknorit Teknor NR 1 Volume 0 x2 Sweden Circular 12.0 Metal 0 0 0 0 MHF-513 MHF-D16 0
Teknorit Teknor NR 3 Weight 0 Sweden Circular 12.0 Metal 0 0 0 0 MHF-513 MHF-D16 0
Teknorit Teknor NR 4 Length mm 0 Sweden Circular 12.0 Metal 0 0 0 0 MHF-513 MHF-D16 0
Teknorit Teknor NR 6 Surface 0 Sweden Circular 12.0 Metal 0 0 0 0 MHF-513 MHF-D16 0
Teknorit Teknor NR 7 Pressure 0 Sweden Circular 12.0 Metal 0 0 0 0 MHF-513 MHF-D16 0
Teknorit Teknor NR 8 Temperature 0 Sweden Circular 12.0 Metal 0 0 0 0 MHF-513 MHF-D16 0
Teknorit Teknor NR 9 Energy, HP 0 Sweden Circular 12.0 Metal 0 0 0 0 MHF-513 MHF-D16 0
The Art Engraving and Colortype CO 1258 size reduction 0 USA Special 26.0 Wood 0 0 0 0 MHF-428 MHF-D24 0
The B. F. Cummings Co. Check Perforator 1922 USA Other 0.0 Metal 0 0 0 0 MHF-779 Workshop 0
The Cretex Companies, Inc. Sewer Design Slide Rule (Based on Kutter's Formula) 1947 USA Special 27.5 Paper 0 1 0 0 MHF-628 MHF-D24 0
Thinkgeek 1337 Nanoline 2009 China Linear 25.0 Plastic 1 1 1 0 MHF-378 MHF-D20 0
Thomas S. Airev Automotive Computing Slide Rule 0 USA Special 12.7 Plastic 0 0 0 0 MHF-450 MHF-D24 0
Thornton Nautical 0552/1148 0 UK Linear 27.0 Plastic 1 1 0 0 MHF-463 MHF-D25 0
U. S. Army Direction plotting 0 with Downwind Distance Slide Rule USA Special 20.5 Plastic 0 0 0 0 MHF-523 MHF-D18 0
U. S. Army Downwind Distance Slide Rule Chemical Weapons CTA 3-7-7 0 GTA 3-7-3 USA Special 12.6 Paper 0 0 0 0 MHF-511 MHF-D17 0
Unique 1140 Log Log 0 UK Linear 12.7 Wood 0 0 1 0 MHF-396 MHF-D23 0
Unique Log Log Slide Rule 0 UK Linear 25.3 Wood 0 0 1 0 MHF-397 MHF-D23 0
Unknown Cufflinks Sterling 0 USA Jewelry 0.0 Metal 0 0 0 0 MHF-654 MHF-Box1 0
Unknown Investor's Stock Computer 0 USA Special 22.5 Plastic 0 0 0 0 MHF-457 MHF-D24 0
Unknown Regle Logarithmique 0 France Special 40.0 Metal 0 1 0 0 MHF-817 MHF-D14 0
Unknown Sector 0 UK Special 15.0 No Value 0 0 0 0 MHF-559 Cabinet 0
Unknown Tape Drive 0 USA Jewelry 3.6 Metal 0 0 0 0 MHF-664 MHF-Box1 0
Unknown Tie Clip 0 USA Jewelry 5.0 Plastic 0 0 1 0 MHF-766 MHF-Box1 0
Unknown Tie Clip 0 USA Jewelry 5.0 Plastic 0 0 0 0 MHF-655 MHF-Box1 0
Unknown Tie Clip 0 USA Jewelry 6.5 Plastic 0 0 0 0 MHF-657 MHF-Box1 0
Unknown Tie Clip w/ button loop 0 USA Jewelry 5.0 Plastic 0 0 1 0 MHF-787 MHF-Box1 0
Unknown Unknown 0 UK Linear 10.0 Wood 0 1 0 0 MHF-615 MHF-D23 0
Unknown Kitchen Slide Rule 0 USA Special 25.0 Wood 0 0 0 0 MHF-627 MHF-D25 0
Unknown - Superior Piping Tie Clip 0 USA Jewelry 3.6 Plastic 0 0 1 0 MHF-656 MHF-Box1 0
Upjohn USX 2833.00 Injection Calculator 1995 USA Special 10.0 Plastic 0 0 0 0 MHF-517 MHF-D16 0
Upjohn USX 9557.00 Pregnancy Calculator 1993 USA Special 11.5 Plastic 0 0 0 0 MHF-516 MHF-D16 0
US Army M24 Howitzer 75mm 1945 7674033 USA Linear 28.0 Wood 0 0 0 0 MHF-470 MHF-D25 0
Utilities Distributors, Inc. UDI Gas Slide Rule 1946 EAC 7-20-46 USA Special 25.5 Wood 1 0 0 0 MHF-438 MHF-D24 0
Vernon Cufflinks 0 USA Jewelry 0.0 Metal 0 0 0 0 MHF-658 MHF-Box1 0
Vernon Tie Clip & Cufflinks 0 USA Jewelry 4.0 Metal 0 0 0 0 MHF-660 & A MHF-Box1 0
Vernon Tie Clip & Cufflinks 0 USA Jewelry 4.0 Metal 0 0 0 0 MHF-659 & A MHF-Box1 0
Vernon Tie Clip Sterling 0 USA Jewelry 4.0 Metal 0 0 0 0 MHF-661 MHF-Box1 0
W & G 432 Comprehensive 0 Australia Linear 25.0 Wood 0 0 1 0 MHF-617 MHF-D23 0
W C Cox Devonport Timber 0 USA Linear 58.0 Wood 0 0 0 0 MHF-619 MHF-D25 0
W. & L. E. Gurley Cox Stadia Computer 1889 USA Special 12.0 Paper 0 0 0 0 MHF-493 MHF-D16 0
W. & L. E. Gurley Cox Stadia Computer Cat. No. 3100 0 USA Special 12.0 Plastic 0 0 0 0 MHF-492 MHF-D16 0
W.H.H. Vickers Rule Slide M.G. (AUST.) MK.I. 0 Australia Special 15.0 Metal 0 0 0 0 MHF-781 MHF-D25 0
Walter H. McKenna & Co. Inc. Tie Clip 0 USA Jewelry 3.0 Metal 0 0 0 0 MHF-663 MHF-Box1 0
Walter H. McKenna & Co. Inc. Tie Clip 0 USA Jewelry 3.0 Metal 0 0 1 0 MHF-662 MHF-Box1 0
Warren - Knight Co. 1373B Wakco Weight Rule 0 USA Special 33.5 Plastic 0 1 0 0 MHF-420 MHF-D24 0