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Scientific Apparatus
Thacher's Calculating Instrument in wood case

Patented 1881. No. 4012, serial number #255. Beautiful condition. With wood case. Manufacturer: Keuffel & Esser Co, NY.

ID: 1980-00041

MEDIUM: Ivory and other; LENGTH: 21.5 x 5.5 x 5.5 inches; QUANTITY: 1

Topics: Mathematics

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