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Mike Frey Slide Rules

Slide Rules and Other Things

Keuffel & Esser 4071T 10″ Polyphase Duplex Trig – 77

Front
Back
log Scale
Bottom

End Stamp 77

Clark McCoy’s K&E Catalogs – 4071 Information page

Catalog Number: MHF-115, Location: MHF-D3

Mike Frey Slide Rules
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