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Faber-Castell TR1 (TR1 Calculator Slide Rule)

The Faber-Castell TR1 is an arithmetic calculator with 8 digits precision and algebraic logic. It has 9 functions, 21 keys, and an LED (light-emitting diode) display, typical of calculators of this era. Note: Combination slide rule and calculator.

Facts at a glance:

FeatureValue
TypeArithmetic
Functions9
Keys21
Precision8
LogicAlgebraic
Display typeLED
Length58mm
Width172mm
Thickness15mm
Weight140g
Year introduced1973
Year discontinued1973

Replacements:

If you have a Faber-Castell TR1 that is no longer working, you can consider replacing the calculator with a modern equivalent. We suggest the following current models as possible replacements:

See other calculators by Faber-Castell