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:

Feature Value
Type: Arithmetic
Functions: 9
Keys: 21
Precision: 8
Logic: Algebraic
Display type: LED
Length: 58mm
Width: 172mm
Thickness: 15mm
Weight: 140g
Year introduced: 1973
YearDiscontinued: 1973

See other calculators by Faber-Castell