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Keystone 395 (exponent 1)

The Keystone 395 is an arithmetic calculator with 8 digits precision and algebraic logic. It has 8 functions, 22 keys, and a gas discharge display. The power source is 4xAA sealed.

Facts at a glance:

FeatureValue
TypeArithmetic
Functions8
Keys22
Precision8
LogicAlgebraic
Display typeDischarge
Length133mm
Width81mm
Power Source4xAA sealed
Year introduced1974
Year discontinued1974

Replacements:

If you have a Keystone 395 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 Keystone