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Imperial 91K

The Imperial 91K 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 4xAAA. The calculator was manufactured in Japan. Note: Royal 91K

Facts at a glance:

FeatureValue
TypeArithmetic
Functions6
Keys24
Precision8
LogicAlgebraic
Display typeVFD
Length118mm
Width74mm
Thickness20mm
Power Source4xAAA
CountryJapan
Year introduced1975

Replacements:

If you have an Imperial 91K that is no longer working, you can first try replacing the 4xAAA 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