Citizen 820R

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1974
Description

The Citizen 820R is an arithmetic calculator with 8 digits precision and algebraic logic. It has 7 functions, 22 keys and a VFD (vacuum fluorescent) display. The power source is 4xAA batteries.

Legacy Content: Unknown Author
Hardware Type
Calculator
Manufacturer
Citizen Holdings Co., Ltd.
Model Number
820R
Launch Date
1974

Citations:

Courtesy of Calculator.org
Courtesy of MyCalcDB
Courtesy of Catawiki
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