Radio Shack EC-243 Handheld Electronic Calculator

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This handheld electronic calculator has a plastic case in two shades of gray, a silver-colored keyboard, and twenty-three rectangular plastic keys. The meaning of the keys is written above them on the keyboard. Keys include ten digit keys, a decimal point key, a total key, four arithmetic function keys, and four memory keys. The top row has an on/off switch, a square root key, a % key, and a clear/clear entry key. Behind the keyboard is an eight-digit green fluorescent display. Text behind this reads: Radio Shack (/) MEMORY EC-243.
A compartment for two AA batteries is at the top of the back. A jack for a power adapter is along the back edge. A sticker below the compartment reads: Radio Shack (/) Cat. No. : 65-618 (/) Model : EC-243 (/) DC : 3V (“AA” Cell x 2) (/) For 120V AC Operation (/) Use AC Adaptor 65-735 (/) Custom Mfd. in Hong Kong for (/) RADIO SHACK. A Division of Tandy Corp. (/) 7J-208.
The calculator has a power adapter that plugs into the back edge. It is marked: Radio Shack (/) 273-1435 (/) 3V AC Adapter.
Compare 1986.0988.043 (Radio Shack EC-242).
Radio Shack, A Tandy Company, 1978 Catalog No. 289, p. 146, accessed September 22, 2014, at The price listed is $14.95.
Radio Shack, A Tandy Company, 1979 Catalog No. 302, p. 129, accessed September 22, 2014, at The price listed is $14.95.
Currently not on view
date made
Tandy Corporation
place made
Zhonghua: Hong Kong
Physical Description
plastic (case; keys; display cover; cord material)
metal (circuitry material)
paper (sticker material)
overall: 1 1/4 in x 2 3/4 in x 5 3/4 in; 3.175 cm x 6.985 cm x 14.605 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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