CASED THACHER'S CALCULATING INSTRUMENT
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Description
Circa 1914 Thacher's Calculating Instrument or Cylindrical Slide Rule, designed by Edwin Thacher in 1884, this version manufactured by Keuffel & Esser Co. of New York, with tag stamped "No. 4012, Serial 4045" inside the fitted mahogany case, along with company tag. Includes an original 1914 edition of the handbook. 6 1/4" x 24" x 6 3/4". Fine condition.
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CASED THACHER'S CALCULATING INSTRUMENT
Estimate $1,000 - $1,500
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Item located in Thomaston, ME, usSee Policy for Shipping
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