APF MARK 56
The APF MARK 56 is a scientific calculator with algebraic logic. It has an LED (light-emitting diode) display, typical of calculators of this era. The power source is Sealed battery pack.
Facts at a glance:
|Power Source||Sealed battery pack|
If you have an APF MARK 56 that is no longer working, you can consider replacing the calculator with a modern equivalent. We suggest the following current model as a replacement: