Unisonic 21
The Unisonic 21 is an arithmetic calculator with 12 digits precision and algebraic logic. It has 4 functions, 25 keys, and a VFD (vacuum fluorescent) display. The power source is 3xC.
These are Blackjack games/calculators. The calculator can be switched between calculator and game modes, the latter allowing you to play Blackjack against the machine. In later models the display fascia is designed to suggest a Blackjack table. They have been available in a number of sizes and physical designs over the years.
Note: Black-Jack calculator
Facts at a glance:
| Feature | Value |
|---|---|
| Type | Arithmetic |
| Functions | 4 |
| Keys | 25 |
| Precision | 12 |
| Logic | Algebraic |
| Display type | VFD |
| Power Source | 3xC |
| Year introduced | 1975 |
Replacements:
If you have a Unisonic 21 that is no longer working, you can consider replacing the calculator with a modern equivalent.
We suggest the following current models as possible replacements: