Bohn Instant Handheld Electronic Calculator

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This hefty turquoise handheld electronic calculator has a plastic case, keyboard, keys, and screen.It fits in a black plastic, cloth-lined, zippered sleeve. It has an array of ten digit keys with a decimal point key, four keys for arithmetic operations, a total key right of these, a clear key, and a percentage key. A red button above the 7 key apparently allows one to switch between floating point arithmetic and dollars and cents. Above the keys are an on/off switch and a switch between the AC adapter and the battery. (The example presently has no adapter and no battery.) Behind this is an eight-digit green-tube display. A mark behind the display reads: Bohn Instant. On the back is a two-prong plug for an adapter. The back has two plastic feet and, at the base, a compartment that would hold five batteries.
A silver-colored sticker on the back reads: BOHN REX-ROTARY (/) MODEL-BOHN INSTANT (/) VOLTAGE-7.5 VOLTS, D, C, POWER-1.5 V. A. (/) SERIAL NO. 3715751-A (/) SERVICE CENTERS (/)475 S. DEAN ST. (/) ENGLEWOOD N. J. 07631. A second service center has address: 121 PALM ST. (/) ALHAMBRA CAL 91801. A mark on the back reads: MADE IN TAIWAN.
The Bohn Duplicator Company had distributed Danish adding machines and Rex-Rotary duplicating machines. For an example of one of the adding machines, see 1995.0018.01.
The date of about 1972 for the Bohn Instant is given by Ball and Flamm.
Guy Ball and Bruce Flamm, The Complete Collector's Guide to Pocket Calculators, Tustin, CA: Wilson/Barnett, 1997, p. 34.
Currently not on view
date made
ca 1972
place made
Physical Description
plastic (case; keys; display cover; sleeve material)
paper (sticker material)
metal (electrical connections material)
overall: 1 3/4 in x 3 in x 6 1/2 in; 4.445 cm x 7.62 cm x 16.51 cm
ID Number
catalog number
accession number
Credit Line
Gift of John B. Priser
See more items in
Medicine and Science: Computers
Handheld Electronic Calculators
Computers & Business Machines
Data Source
National Museum of American History


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