Keystone SC 654
The Keystone SC 654 is an arithmetic calculator with algebraic logic. It has a VFD (vacuum fluorescent) display. The power source is Sealed battery pack.
Facts at a glance:
|Power Source||Sealed battery pack|
If you have a Keystone SC 654 that is no longer working, you can consider replacing the calculator with a modern equivalent. We suggest the following current models as possible replacements: