Concept 24 Handheld Electronic Calculator

This handheld electronic calculator has a black plastic case with an aluminum keyboard, rounded rectangular plastic keys, and a plastic display cover. The array of twenty-four keys includes ten digit keys and a decimal point key (all white), as well as four keys for arithmetic functions, a total key, a percentage key, a square root key, and a change sign key (all blue). The four memory keys in the top row and the clear entry/clear key at the bottom left are yellow. Above the eight-digit vacuum fluorescent display, text reads: CONCEPT24. The on/off switch is on the left edge and the socket for a power adapter is on the top edge.

The back of the calculator has a compartment that holds two batteries. A sticker inside it reads: G.C. 12 (/) PASSED. Text on the back of the cover reads: Electronic Calculator (/) Power Supply 3VDC. 300mW. (/) Use 2x1.5V UM3 Batteries (/) MADE IN HONG KONG.

The calculator has a black plastic sleeve.

The Concept 24 calculator was imported, named, and sold in several versions by the discount department store Zayre.

References:

Frederick Post , March 26, 1976, p. A8. This is a different version of the calculator. It sold for $15.88.

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