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Faber-Castell TR4

The Faber-Castell TR4 is a scientific calculator with 8 digits precision and algebraic logic. It has 26 functions, 25 keys and an LED (light-emitting diode) display, typical of calculators of this era.

Facts at a glance:

Type Scientific
Functions 26
Keys 25
Precision 8
Logic Algebraic
Display type LED
Display size
Length 58 mm
Width 172 mm
Thickness 15 mm
Weight unknown g
Power Source
Original price unknown
Est. current value unknown
Year introduced 1975
Year discontinued

See other calculators manufactured by Faber-Castell.