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Imperial 81M

The Imperial 81M is an arithmetic calculator with 8 digits precision and algebraic logic. It has 5 functions, 19 keys, and a VFD (vacuum fluorescent) display. The power source is 3xAAA. Note: Royal 81M

Facts at a glance:

FeatureValue
TypeArithmetic
Functions5
Keys19
Precision8
LogicAlgebraic
Display typeVFD
Length92mm
Width63mm
Thickness22mm
Power Source3xAAA
Year introduced1975

Replacements:

If you have an Imperial 81M that is no longer working, you can first try replacing the 3xAAA 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 Imperial