calculator.org

the calculator home page

Litronix 1720A (checkmate 1720)

The Litronix 1720A 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 1720A 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