Montgomery Ward P90 (DAN-8670A)
The Montgomery Ward P90 is an arithmetic calculator with 8 digits precision and algebraic logic. It has 6 functions, 18 keys, and an LED (light-emitting diode) display typical of calculators of this era. The power source is PP3 9V battery. Note: APF Mark 40
Facts at a glance:
| Feature | Value |
|---|---|
| Type | Arithmetic |
| Functions | 6 |
| Keys | 18 |
| Precision | 8 |
| Logic | Algebraic |
| Display type | LED |
| Length | 114mm |
| Width | 70mm |
| Power Source | PP3 9V battery |
| Year introduced | 1974 |
Replacements:
If you have a Montgomery Ward P90 that is no longer working, you can first try replacing the PP3 9V battery. 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: