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Mike Frey Slide Rules

Slide Rules and Other Things

Keuffel & Esser 4058W 10″ Mannheim Beginner’s Slide Rule – MHF-27

Front
Back
Side – Top
Side – Bottom

No Serial Number

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

Catalog Number: MHF-27, Location MHF-D1

Mike Frey Slide Rules
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