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
Walther, through an OEM agreement with Ricoh, sold these calculators
under the Walther brand as the
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