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 batteries.
Facts at a glance:
| Feature | Value |
|---|---|
| Type | Scientific |
| Logic | Algebraic |
| Display type | VFD |
| Length | 152mm |
| Width | 76mm |
| Power Source | 4xAA batteries |
| Year introduced | 1975 |
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: