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Litronix 1720 (checkmate 1720)

The Litronix 1720 is an arithmetic calculator with 8 digits precision and algebraic logic. It has 7 functions, 25 keys, and an LED (light-emitting diode) display typical of calculators of this era. The power source is 3xAA.

Facts at a glance:

FeatureValue
TypeArithmetic
Functions7
Keys25
Precision8
LogicAlgebraic
Display typeLED
Length165mm
Width81mm
Thickness23mm
Power Source3xAA
Year introduced1975

Replacements:

If you have a Litronix 1720 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 Litronix