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Mike Frey Slide Rules

Slide Rules and Other Things

Keuffel & Esser 68 1892 10″ Plastic Mannheim Beginner’s Slide Rule – MHF-35

Front
Back

No Serial Number

Clark McCoy’s K&E Catalogs – 4058 Information page

Catalog Number: MHF-35, Location MHF-D2

Mike Frey Slide Rules
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