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Object Name: Adder
Date: 1900-1920
Medium: Metal
Dimensions: Overall: 4 1/2 × 3 × 7/8 in. (11.4 × 7.6 × 2.2 cm)
Description: Eight digit adder, resembling a tobacco tin, black enamel finish with gold striping and numbers, registers up to $999,999.99; marked on the edge in gold: "The Bassett Adder, Patents Pending" and on the back "Manufactured only by J.H. Bassett & Co., Chicago, ILL. USA".
Credit Line: Gift of Bella C. Landauer
Object Number: 2002.1.2560
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Operated by placing the point of a stylus into the holes marked with gold numbers and sliding the black indicator line to the desired number. The only innovation in this simple adder is a red flag appearing in the column to the left signaling when it is necessary to carry.