Sold at Auction: Vintage Keuffel and Esser Co. Jet-Math Slide Rule

Rare Thacher's Calculating Instrument / Slide Rule by Keuffel

Slide Rule , Nice Old One W Original Case 1906 Or

Slide rule, Chemist's Adjustable Duplex, 4160, made by Keuffel

12 INCHES GOOD USED CONDITION WITH SOME STAINS THE SLIDE HAS A CRACK ON EACH END AS SHOWN IN PICTURES VERY EARLY RARE PIECE MARKED WITH THE DATE OF

Vintage EARLY ANTIQUE 1908 Keuffel & Esser Co Slide Rule With RARE Case

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5.10 Keuffel and Esser, USA Following the Rules — A Slide Rule