Sperry Remington 661 (Sperry Rand Remington 661)
The Sperry Remington 661 is an arithmetic calculator with 6 digits precision and algebraic logic. It has 4 functions, 16 keys, and a VFD (vacuum fluorescent) display. The power source is 4xAA. Note: 6 digit display, 12 digits internal precision
Facts at a glance:
If you have a Sperry Remington 661 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: