Unisonic 1212 Handheld Electronic Calculator

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This handheld electronic calculator has a metal and plastic case with an array of nineteen square plastic keys. These include ten digit keys, a decimal point key, an exchange key, four arithmetic function keys, a total key, a clear key, and a clear entry key. It does not include such common slide rule functions as square roots or trigonometric functions.
A mark behind the keyboard reads: Unisonic 1212 (/) SLIDE RULETTE. Behind this is a green vacuum fluorescent display. A switch and a jack for a power supply are along the back edge. Text on the back reads: Unisonic 1212 (/) RATING 6V-DC 0.6W (/) NO. 046435 (/) MADE IN JAPAN. The digits of the serial number are very difficult to read. Below this is a compartment for four AA batteries.
Compare 1986.0988.119.
[Advertisement], Washington Post, May 15, 1974, p. E7. Unisonic 1212 “mini pocket calculator,” regularly priced at $43.96, on sale for $37.88.
Currently not on view
date made
ca 1974
place made
Physical Description
plastic (case; keys; circuit board material)
metal (case; circuitry material)
glass (display material)
overall: 1 in x 3 3/8 in x 5 1/4 in; 2.54 cm x 8.5725 cm x 13.335 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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