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Imperial 81SR

The Imperial 81SR is a scientific calculator with 8 digits precision and algebraic logic. It has 16 functions, 19 keys and a VFD (vacuum fluorescent) display. The power source is 4xAAA batteries.

Facts at a glance:

Type Scientific
Functions 16
Keys 19
Precision 8
Logic Algebraic
Display type VFD
Display size
Length 95 mm
Width 65 mm
Thickness 23 mm
Weight unknown g
Power Source 4xAAA
Original price unknown
Est. current value unknown
Year introduced 1975
Year discontinued

See other calculators manufactured by Imperial.