Walther ETR-1 Desktop Calculator
Walther ETR-1, Circa 1969
The Walther ETR-1 is the first electronic calculator that Walther
put to market in 1969. The machine was not manufactured by Walther, however.
The ETR-1 was manufactured by Ricoh in Japan, and sold by Walther
in Europe as the ETR-1 via an OEM agreement between Walther and Ricoh.
The ETR-1 was a
Ricoh Ricomac 1210
with Walther badging and identification tag. This machine is a basic
four-function desktop calculator with twelve digits of capacity, and an
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 ETR-1 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
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