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APF MARK 65r

APF MARK 65r
Image: Joe Haupt, CC BY-SA 2.0

The APF MARK 65r is an arithmetic calculator with 8 digits precision and algebraic logic. It has 6 functions, 24 keys, and a VFD (vacuum fluorescent) display. The power source is 2xAAA sealed.

Facts at a glance:

FeatureValue
TypeArithmetic
Functions6
Keys24
Precision8
LogicAlgebraic
Display typeVFD
Length125mm
Width74mm
Thickness26mm
Power Source2xAAA sealed
Year introduced1977
Year discontinued1977

Replacements:

If you have an APF MARK 65r that is no longer working, you can first try replacing the 2xAAA 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 APF