RES Mark IX
The RES Mark IX is an arithmetic calculator with 8 digits precision and algebraic logic. It has 7 functions, 20 keys, and a VFD (vacuum fluorescent) display. The power source is Sealed battery pack. Note: Regan Industries RA900P
Facts at a glance:
| Feature | Value |
|---|---|
| Type | Arithmetic |
| Functions | 7 |
| Keys | 20 |
| Precision | 8 |
| Logic | Algebraic |
| Display type | VFD |
| Length | 140mm |
| Width | 89mm |
| Power Source | Sealed battery pack |
| Year introduced | 1972 |
Replacements:
If you have a RES Mark IX that is no longer working, you can consider replacing the calculator with a modern equivalent.
We suggest the following current models as possible replacements: