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APF MARK 64

The APF MARK 64 is an arithmetic calculator with algebraic logic. It has 8 functions, 19 keys, and an LED (light-emitting diode) display, typical of calculators of this era. The power source is PP3 9V.

Facts at a glance:

FeatureValue
TypeArithmetic
Functions8
Keys19
LogicAlgebraic
Display typeLED
Length127mm
Width64mm
Power SourcePP3 9V
Year introduced1975

Replacements:

If you have an APF MARK 64 that is no longer working, you can first try replacing the PP3 9V battery. 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