Imperial 91K
The Imperial 91K is an arithmetic calculator with 8 digits precision and algebraic logic. It has 6 functions, 24 keys, and a VFD (vacuum fluorescent) display. The power source is 4xAAA batteries. The calculator was manufactured in Japan. Note: Royal 91K
Facts at a glance:
| Feature | Value |
|---|---|
| Type | Arithmetic |
| Functions | 6 |
| Keys | 24 |
| Precision | 8 |
| Logic | Algebraic |
| Display type | VFD |
| Length | 118mm |
| Width | 74mm |
| Thickness | 20mm |
| Power Source | 4xAAA batteries |
| Country | Japan |
| Year introduced | 1975 |
Replacements:
If you have an Imperial 91K that is no longer working, you can first try replacing the 4xAAA 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: