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:
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: