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Citizen 810R

The Citizen 810R is an arithmetic calculator with 8 digits precision and algebraic logic. It has 5 functions, 20 keys, and a VFD (vacuum fluorescent) display. The power source is 4xAA sealed.

Facts at a glance:

FeatureValue
TypeArithmetic
Functions5
Keys20
Precision8
LogicAlgebraic
Display typeVFD
Length151mm
Width87mm
Thickness34mm
Weight278g
Power Source4xAA sealed
Year introduced1973
Year discontinued1974

Replacements:

If you have a Citizen 810R that is no longer working, you can first try replacing the 4xAA sealed batteries. If that doesn't solve the problem, then you can consider replacing the calculator with a modern equivalent. We suggest the following current models as possible replacements:

See other calculators by Citizen