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Mike Frey Slide Rules

Slide Rules and Other Things

Keuffel & Esser 68 1576 (4161-3) 10″ Modern Polyphase (Jet Math) -008308

Front
Gutter
Back

Clark McCoy’s K&E Catalogs – 4161 information page

Catalog Number: MHF-76, Location: MHF-D3

Also See: 4161-3 10″ Plastic Polyphase Mannheim

Mike Frey Slide Rules
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