MBO MONARCH 20
The MBO MONARCH 20 is an arithmetic calculator with 8 digits precision and algebraic logic. It has 8 functions, 24 keys, and a VFD (vacuum fluorescent) display.
Facts at a glance:
If you have a MBO MONARCH 20 that is no longer working, you can consider replacing the calculator with a modern equivalent. We suggest the following current models as possible replacements: