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Keystone SC 656

The Keystone SC 656 is a scientific calculator with unknown digits precision and algebraic logic. It has 18 functions, 30 keys and an LED (light-emitting diode) display, typical of calculators of this era. The power source is Sealed battery pack.

Facts at a glance:

Type Scientific
Functions 18
Keys 30
Precision unknown
Logic Algebraic
Display type LED
Display size
Printer
Length 152 mm
Width 81 mm
Thickness unknown mm
Weight unknown g
Power Source Sealed battery pack
Country
Original price unknown
Est. current value unknown
Year introduced 1975
Year discontinued

See other calculators manufactured by Keystone.