MBO Ruler Calculator
The MBO Ruler Calculator is an arithmetic calculator with 8 digits precision and algebraic logic. It has 23 keys, and an LCD (liquid crystal) display. Note: Ruler with a calculator and a watch.
Facts at a glance:
If you have a MBO Ruler Calculator that is no longer working, you can consider replacing the calculator with a modern equivalent. We suggest the following current models as possible replacements: