Zykkor LC-224 Handheld Electronic Calculator

This handheld electronic calculator is on a key chain. It has a gold-colored metal case with an array of twenty-five metal keys and a metal chain. In addition to ten digit keys, a decimal point key, a total key, four arithmetic function keys, and four memory keys, it has a square root key, a percentage key, a clear entry key, an on/clear key, and an off key. A mark above the keys reads: ZYKKOR LC-244. Behind this is an eight-digit LCD display.
Zykkor was a Japanese manufacturer of optical lenses and other photographic products. In the 1980s it distributed a wide variety of electronic products.
A mark on the back reads: MADE IN TAIWAN R.O.C. (/) FABRIQUE A TAIWAN R.D.C.
The calculator.org website gives a date of introduction of 1985 for this calculator.
Calculator.org website, accessed July 8, 2015.
[Advertisement], New York Times, January 29, 1985, p. A7. Zykkor LC-220 (a different model calculator) advertised as on sale for $3.95.
MyCalcDB.free.fr website, accessed July 8, 2015.
Currently not on view
Object Name
electronic calculator
date made
ca 1985
Physical Description
metal (case; keys; chain material)
plastic (circuit board material)
overall: 3/8 in x 1 3/4 in x 2 1/4 in; .9525 cm x 4.445 cm x 5.715 cm
place made
ID Number
catalog number
accession number
See more items in
Medicine and Science: Computers
Handheld Electronic Calculators
Computers & Business Machines
Data Source
National Museum of American History, Kenneth E. Behring Center
Credit Line
Gift of John B. Priser
Additional Media

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