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Sinclair Sovereign

Sinclair Sovereign
Image: wass.net used with permission

The Sinclair Sovereign is an arithmetic calculator with 8 digits precision and algebraic logic. It has 8 functions, 21 keys, and an LED (light-emitting diode) display typical of calculators of this era. The power source is 2x1.5V mercury cell. Note: Available in chrome, black and gold plate.

Facts at a glance:

FeatureValue
TypeArithmetic
Functions8
Keys21
Precision8
LogicAlgebraic
Display typeLED
Length141mm
Width36mm
Thickness12mm
Power Source2x1.5V mercury cell
Year introduced1976
Year discontinued1977

Replacements:

If you have a Sinclair Sovereign that is no longer working, you can first try replacing the 2x1.5V mercury cell. 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 Sinclair