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Royal 12HT (UA221)

The Royal 12HT is a scientific calculator with algebraic logic. It has a VFD (vacuum fluorescent) display. The power source is 4xAA.

Facts at a glance:

FeatureValue
TypeScientific
LogicAlgebraic
Display typeVFD
Length152mm
Width76mm
Power Source4xAA
Year introduced1975

Replacements:

If you have a Royal 12HT that is no longer working, you can first try replacing the 4xAA batteries. If that doesn't solve the problem, then you can consider replacing the calculator with a modern equivalent. We suggest the following current model as a replacement:

See other calculators by Royal