Calfax Data Brain II Handheld Electronic Calculator

This handheld electronic calculator has a mustard- and olive-colored plastic case and an array of twenty square plastic keys. These include ten digit keys, a clear/clear entry key, a decimal point key, a total key, four arithmetic function keys, a percentage key, a memory key, and a recall memory/cancel memory key. The on/off switch is on the right side above the keyboard. A mark left of this reads: data brain II. Behind is an eight-digit LED display.

A power jack is along the back edge of the calculator. A sticker on the back gives operating instructions. It reads in part: MANUFACTURED IN HONG KONG BY (/) AMERICAN IMPORT MERCHANTS CORPORATION (/) CALFAX DIVISION. Below this is a compartment for a nine-volt battery. A sticker below this reads: Serial No. 143893.

Ball and Flamm give a date of about 1974 for this calculator.

Reference: Guy Ball and Bruce Flamm, The Complete Collector’s Guide to Pocket Calculators, Tustin, CA: Wilson/Barnett, 1997, p. 43.

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