APF MARK 23 (Electronic Slide Rule Calculator)
The APF MARK 23 is an arithmetic calculator with 8 digits precision and algebraic logic. It has 9 functions, 20 keys, and a VFD (vacuum fluorescent) display. The power source is Sealed battery pack. The calculator was manufactured in Japan.
Facts at a glance:
|Power Source||Sealed battery pack|
If you have an APF MARK 23 that is no longer working, you can consider replacing the calculator with a modern equivalent. We suggest the following current models as possible replacements: