This small, thin, flat handheld electronic calculator has a metal case and an array of twenty-four rectangular plastic keys. The ten digit keys and decimal point key are white. The total key, four arithmetic function keys, three memory keys, the change sign key, the % key, and the square root key are brown. The clear and clear entry keys are red. The on/off switch is to the left on the top row of keys.
Behind the keyboard is an eight-digit LCD display. Text behind it reads: Radio Shack. Text below the keyboard reads: statesman thin LCD.
The calculator has a brown plastic backing; the cover is missing.
Compare Radio Shack EC-267 (1986.0988.045).
Radio Shack, A Tandy Company, 1980 Catalog No. 315, p. 166, accessed September 26, 2014, at radioshackcatalogs.com. The price listed for the EC-257 calculator is $19.95.
Radio Shack, A Tandy Company, 1981 Catalog No. 328, p. 164, accessed September 22, 2014, at radioshackcatalogs.com. The price listed for the EC-258 calculator is $17.95.
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