Sanyo CX 1231 Handheld Electronic Calculator

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The dark brown plastic case of this handheld electronic calculator has a metal inset around the display. The calculator has twenty-five rectangular plastic keys. These include ten digit keys, a decimal point key, four arithmetic function keys, a total key, a clear key, a % key, a square root key, a change sign key, and three memory keys. The top row of keys also has the on and off keys. Behind this is an eight-digit LCD display. Text behind this reads: SANYO (/) CX 1231. There is no provision for a power adapter.
The back has a compartment for two AA batteries. Text molded in the case reads in part: SANYO CX 1231 (/) INPUT: DC 3V (TWO “AA” SIZE BATTERIES) (/) POWER: DC 0.00012W (/) SANYO ELECTRIC CO., LTD. BM (/) MADE IN JAPAN / FABRIQUE AU JAPON. A sticker below this reads: No 0086865.
[Advertisment], Los Angeles Times, October 31, 1980, p. N8. Calculator on sale for $7.00.
Currently not on view
date made
ca 1980
Sanyo Electric Company
place made
Physical Description
plastic (case; keys material)
metal (circuitry material)
paper (sticker material)
overall: 1 in x 3 in x 5 in; 2.54 cm x 7.62 cm x 12.7 cm
ID Number
accession number
catalog 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


I bought this item at Montgomery Ward in 1980, and still use it all the time! What else last that long anymore!

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