Sperry Remington 661-D (661D)
The Sperry Remington 661-D is an arithmetic calculator with 6 digits precision and algebraic logic. It has 5 functions, 18 keys, and a VFD (vacuum fluorescent) display. The power source is 4xAA batteries. The calculator was manufactured in Japan. Note: 6 digit display, 12 digits internal precision
Facts at a glance:
| Feature | Value |
|---|---|
| Type | Arithmetic |
| Functions | 5 |
| Keys | 18 |
| Precision | 6 |
| Logic | Algebraic |
| Display type | VFD |
| Length | 153mm |
| Width | 80mm |
| Thickness | 35mm |
| Weight | 238g |
| Power Consumption | 0.500000W |
| Power Source | 4xAA batteries |
| Country | Japan |
| Year introduced | 1973 |
| Year discontinued | 1973 |
Replacements:
If you have a Sperry Remington 661-D that is no longer working, you can first try replacing the 4xAA batteries. 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: