Hitachi KK221B
The Hitachi KK221B is an arithmetic calculator with 8 digits precision and algebraic logic. It has 6 functions, 20 keys, and a VFD (vacuum fluorescent) display. The power source is 4xAA sealed. Note: Singer Friden 1200
Facts at a glance:
| Feature | Value |
|---|---|
| Type | Arithmetic |
| Functions | 6 |
| Keys | 20 |
| Precision | 8 |
| Logic | Algebraic |
| Display type | VFD |
| Length | 170mm |
| Width | 113mm |
| Thickness | 40mm |
| Weight | 472g |
| Power Source | 4xAA sealed |
| Year introduced | 1975 |
Replacements:
If you have a Hitachi KK221B that is no longer working, you can first try replacing the 4xAA sealed. 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: