Baby Calculator Adder

The orange, black, and tan paper box contains a black and gold-colored metal instrument, instructions on pink paper, and a metal stylus. The device has seven columns for addition.
The Baby Calculator was a handheld adder manufactured by the Calculator Machine Company of Chicago from at least 1925 into the 1940s. The Tavella Sales Company of New York City distributed this example. According to the box, it sold for $2.50 in the United States and $3.00 in Canada and other foreign countries. It has hooks at the top of each column for carrying in addition, but none at the bottom to assist in borrowing in subtraction.
References: Typewriter Topics (March 1925), 59:76.
Popular Mechanics (January, 1935), p. 128A; vol. 73 (March, 1940), p. 143A; vol. 83 (February, 1945), p. 192. A new design was introduced in 1945. See Popular Mechanics, April, 1945, p. 202.
Currently not on view
Object Name
date made
ca 1925
Tavella Sales Company
Calculator Machine Company
Physical Description
paper (overall material)
metal (overall material)
overall: 1.2 cm x 8.2 cm x 15.3 cm; 15/32 in x 3 7/32 in x 6 1/32 in
place made
United States: Illinois, Chicago
place distributed
United States: New York, New York
ID Number
catalog number
accession number
Science & Mathematics
See more items in
Medicine and Science: Mathematics
Data Source
National Museum of American History, Kenneth E. Behring Center
Credit Line
Gift of L. Leland Locke

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