Commodore GL-997R Handheld Electronic Calculator

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This handheld electronic calculator has an array of twenty-three oval plastic keys. These include ten digit keys, a decimal point key, four arithmetic function keys, a total key, a clear key, an exchange key, four memory keys, and a percentage key. The on/off switch is to the right of the top keys. Text below the keyboard reads: commodore. Text above the eight-digit green fluorescent display reads: CUSTOM (/) GREEN LINE. An outlet for a power adapter is on the right side of the calculator.
Text on the back cover reads in part: Solid State Portable (/) Electronic Calculator (/) VOLTAGE (/) 4.5 V AC OPERATION (/) Use Commodore (/) adapter DC-420B (/) MODEL (/) GL-997R SERIAL NO. (/) 73954. It also reads: commodore japan limited (/) Made in Japan 200504-02. The case pops open (the screws at the bottom of the back are missing) and holds two AA batteries. The keyboard lifts up to reveal the circuitry, which includes a Commodore chip marked: GRBP-89 (/) 7518. This date code is the basis for the 1975 date of manufacture.
Compare 1986.0988.209
Guy Ball and Bruce Flamm, The Complete Collector’s Guide to Pocket Calculators, Tustin, CA: Wilson/Barnett, 1997, p. 57.
Currently not on view
date made
Commodore Japan Limited
place made
Physical Description
plastic (case; keys; display window material)
glass (tube material)
metal (circuitry material)
overall: 1 1/8 in x 2 3/4 in x 5 1/2 in; 2.8575 cm x 6.985 cm x 13.97 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


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