Vanguard X-821
The Vanguard X-821 is an arithmetic calculator with algebraic logic. It has an LED (light-emitting diode) display typical of calculators of this era.
Facts at a glance:
| Feature | Value |
|---|---|
| Type | Arithmetic |
| Logic | Algebraic |
| Display type | LED |
| Year introduced | 1975 |
Replacements:
If you have a Vanguard X-821 that is no longer working, you can consider replacing the calculator with a modern equivalent.
We suggest the following current models as possible replacements: