Citizen 820SR
The Citizen 820SR is a scientific calculator with algebraic logic. It has 20 functions, 26 keys, and a VFD (vacuum fluorescent) display.
Facts at a glance:
| Feature | Value |
|---|---|
| Type | Scientific |
| Functions | 20 |
| Keys | 26 |
| Logic | Algebraic |
| Display type | VFD |
| Length | 151mm |
| Width | 87mm |
| Thickness | 34mm |
| Year introduced | 1975 |
Replacements:
If you have a Citizen 820SR that is no longer working, you can consider replacing the calculator with a modern equivalent.
We suggest the following current model as a replacement: