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Monroe 20

The Monroe 20 is an arithmetic calculator with 8 digits precision and algebraic logic. It has 5 functions, 18 keys and an LED (light-emitting diode) display, typical of calculators of this era. The power source is 6x1.5V sealed.

Facts at a glance:

Type Arithmetic
Functions 5
Keys 18
Precision 8
Logic Algebraic
Display type LED
Display size
Printer
Length 152 mm
Width 89 mm
Thickness 50 mm
Weight 417 g
Power Source 6x1.5V sealed
Country
Original price unknown
Est. current value unknown
Year introduced 1972
Year discontinued 1973

See other calculators manufactured by Monroe.