Casio Mini CM-602 Handheld Electronic Calculator


This handheld electronic calculator is a modified version of Casio’s first commercial handheld electronic calculator, the Casio Mini. It has a black plastic case with aluminum trim on the front. The array of square plastic keys on the right side includes ten digit keys, a decimal point key, a cancel key, keys for four arithmetic functions, a total key, and an arrow key that is pressed to show more of larger results. Left of the cancel key on the top row of keys is a switch to set the position of the decimal point.

To the left of the keyboard is a six-digit vacuum fluorescent display. Below it is the on/off switch. A mark right of the switch reads: CASIO-MINI (/) ELECTRONIC CALCULATOR. A carrying loop extends from the left edge. This edge also has a socket for a power adapter. A mark inscribed on the trim on the front edge reads: Bob Clemens.

Unscrewing screws on the two ends of the calculator makes it possible to remove the top. A sticker attached in front of the keyboard on the inside reads: 3084597. A mark on a chip below the display reads: 3F 4 (/) HD32154P. This is a large-scale integrated chip made by Hitachi. Above it is a chip made by NEC with number μPD129C.

The back of the calculator has a compartment that would hold four batteries. A mark on the back reads: MINI CM-602 ELECTRONIC (/) CALCULATOR (/) BATTERY SUPPLY 1.5 V x 4 or (/) use AC ADAPTOR AD-4145 (/) 500mW MADE IN JAPAN (/) CASIO COMPUTER CO., LTD. A stcker below this gives operating instructions.

A mark on a sticker on the back of the battery compartment reads: 486383.

A June 1973 illustration of the Casio Mini in the Los Angeles Times shows this model calculator. It was on sale for $59.95.

Compare 1986.0988.184.


Rick Bensene, Old Calculator Museum website.

Los Angeles Times, June 30, 1973, p. D2.

Website of Casio International.

Date Made: 1973

Maker: Casio Computer Company

Location: Currently not on view

Place Made: Japan

See more items in: Medicine and Science: Computers, Computers & Business Machines, Handheld Electronic Calculators


Exhibition Location:

Credit Line: Gift of John B. Priser

Data Source: National Museum of American History

Id Number: 1986.0988.185Accession Number: 1986.0988Catalog Number: 1986.0988.185

Object Name: electronic calculatorOther Terms: electronic calculator; Handheld

Physical Description: plastic (case; keys; switches; circuit board material)glass (tubes material)paper (stickers material)metal (circuitry; trim material)Measurements: overall: 1 3/8 in x 6 in x 3 1/8 in; 3.4925 cm x 15.24 cm x 7.9375 cm


Record Id: nmah_334599

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