Magic-Brain Calculator

This adder has a red plastic back and a gray steel front. There are six columns for entering numbers with a stylus, and a seventh notched band to record carries to a seventh digit. A set of seven openings above the bracket-shaped columns of the adder displays the result. A zeroing bar is across the top. The plastic is shaped to hold the steel stylus.
The object is marked: MAGIC-BRAIN [/] CALCULATOR; ADD + [/] SUBTRACT - [/] MULTIPLY X; and: JAPAN. Instructions are stored separately. Compare to 1987.0375.01.
References: Popular Science, February, 1962, vol. 180, p. 20. This ad indicates that the Magic-Brain Calculator cost $.98 and was distributed from the Sunset Building, Beverly Hills, California.
P. Kidwell, “Adders Made and Used in the United States,” Rittenhouse, 8, (1994): pp. 78-96.
Currently not on view
Object Name
date made
Sunset House
Physical Description
plastic (overall material)
steel (overall material)
overall: 1 cm x 7 cm x 14.4 cm; 13/32 in x 2 3/4 in x 5 21/32 in
place made
place distributed
United States: California, Beverly Hills
ID Number
nonaccession number
catalog number
Science & Mathematics
See more items in
Medicine and Science: Mathematics
Data Source
National Museum of American History, Kenneth E. Behring Center
Additional Media

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