Toshiba LC-830 Handheld Electronic Calculator

This handheld electronic calculator has an aluminum case with plastic trim and an array of twenty-four rectangular plastic keys. These include ten digit keys, a decimal point key, a total key, four arithmetic function keys, four memory keys, a square root key, a percentage key, a change sign key, and a clear entry/clear key. The on/off switch is to the left in the top row of keys. Text below the keyboard reads: ELECTRONIC CALCULATOR LC-830 (/) TOSHIBA. Above the keyboard is an eight-digit liquid crystal display.

A sticker on the back of the calculator reads in part: TOSHIBA (/) ELECTRONIC CALCULATOR (/) LC-830 (/) DC 4.5V SILVER OXIDE BATTERY. It also reads: NO. 247832 BM (/) TOKYO SHIBAURA ELECTRIC CO, LTD. JAPAN.

The calculator is in a plastic wallet that is marked on the front: MADE IN JAPAN. The wallet also contains a pad of paper and a leaflet of instructions.

References:

According to the www.datamath.org website, accessed December 4, 2014, this calculator was introduced in 1978 and still in production in 1979.

According to the mycalcdb.free.fr website, accessed December 4, 2014, this calculator was introduced by 1977 and still produced in 1979.

[Advertisement], Los Angeles Times, December 23, 1979, p. A11. Calculator that appears to be this one is on sale for $19.99.

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