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Citizen 820SR

The Citizen 820SR is a scientific calculator with unknown digits precision and algebraic logic. It has 20 functions, 26 keys and a VFD (vacuum fluorescent) display.

Facts at a glance:

Type Scientific
Functions 20
Keys 26
Precision unknown
Logic Algebraic
Display type VFD
Display size
Length 151 mm
Width 87 mm
Thickness 34 mm
Weight unknown g
Power Source
Original price unknown
Est. current value unknown
Year introduced 1975
Year discontinued

See other calculators manufactured by Citizen.