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Mike Frey Slide Rules

Slide Rules and Other Things

Keuffel & Esser American 10″ Mannheim -97E

Front
Gutter
Back
in Scale
cm Scale

End Stamp 97E

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

Catalog Number: MHF-98, Location MHF-D3

Mike Frey Slide Rules
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