APF RS-1 (Kel-Co)
The APF RS-1 is an arithmetic calculator with algebraic logic. It has 16 functions, 29 keys, and an LED (light-emitting diode) display typical of calculators of this era. The power source is PP3 9V. Note: APF RS-1; Cannelle RS1
Facts at a glance:
| Feature | Value |
|---|---|
| Type | Arithmetic |
| Functions | 16 |
| Keys | 29 |
| Logic | Algebraic |
| Display type | LED |
| Length | 140mm |
| Width | 70mm |
| Power Source | PP3 9V |
| Year introduced | 1979 |
Replacements:
If you have an APF RS-1 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: