THATCHER'S CALCULATING INSTRUMENT BY KEUFFEL & ESSER CO. Model 4012 No. 5715....

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Sold Date 2026 full date locked

Source GARTH'S AUCTIONS, Delaware, OH, USA

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Description

THATCHER'S CALCULATING INSTRUMENT BY KEUFFEL & ESSER CO. Model 4012 No. 5715. Cylindrical slide rule having an inner rotating cylinder. Turned wooden knobs on each end of the cylinder.Paper label with instructions attached to base. Mahogany base and case. Case with brass label ''Keuffel & Esser Co. /...

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