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Mike Frey Slide Rules

Slide Rules and Other Things

Keuffel & Esser 4097D 5″ Mannheim “EverThere” Slide rule –  Expanded Scales – 105130

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Clark McCoy’s K&E Catalogs – “Ever-There Slide Rules” Information page

Catalog Number: MHF-088, Location: MHF-D3

Mike Frey Slide Rules
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