Casio PERSONAL M-1 (H-813)
The Casio PERSONAL M-1 is an arithmetic calculator with 8 digits precision and algebraic logic. It has 6 functions, 21 keys, and a VFD (vacuum fluorescent) display. The power source is 2xAA. The calculator was manufactured in Japan.
Facts at a glance:
If you have a Casio PERSONAL M-1 that is no longer working, you can first try replacing the 2xAA 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: