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Triumph 81 (EC11)

The Triumph 81 is an arithmetic calculator with 8 digits precision and algebraic logic. It has 5 functions, 20 keys, and an LED (light-emitting diode) display, typical of calculators of this era. The power source is 3xAA. Note: Adler 81

Facts at a glance:

FeatureValue
TypeArithmetic
Functions5
Keys20
Precision8
LogicAlgebraic
Display typeLED
Length119mm
Width69mm
Thickness24mm
Weight140g
Power Source3xAA
Year introduced1973
Year discontinued1974

Replacements:

If you have a Triumph 81 that is no longer working, you can first try replacing the 3xAA batteries. If that doesn't solve the problem, then you can consider replacing the calculator with a modern equivalent. We suggest the following current models as possible replacements:

See other calculators by Triumph