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Ricoh 1210 Desktop Calculator


Ricoh 1210, Circa 1969
Image Courtesy of Mr. Takaharu Yoshida

The Ricoh 1210 is one of Ricoh's earliest electronic calculators. It is a basic four-function desktop calculator with twelve digits of capacity, and an accumulator-style memory register. Decimal point is fixed by a front panel slide switch at 0, 3, or 5 digits behind the decimal. The omission of a setting for two digits behind the decimal is curious, as such a setting is commonly used for financial calculations. Display is via Nixie tubes made by NEC, with 1/2" high digits and a right-hand decimal point. The memory register has a summation mode that will automatically accumulate sums of products or quotients in the memory register. The memory register can also be directly added to or subtracted from, as well as stored directly into (from the display), or recalled to the display. The 1210 uses a combination of small-scale MOS integrated circuits made by NEC, in conjunction with a large number of discrete semiconductor devices (transistors, diodes) and passive devices (resistors, capacitors).

Walther, through an OEM agreement with Ricoh, sold these calculators under the Walther brand as the Walther ETR-1.
Copyright ©1997-2020, Rick Bensene.