While you wait for answers, we may have found some information which could help you.
Click here for Olympia Cm 812how remove password on olympia cm721 plus?
How to fix my Olympia CM701?
how to set time and date on olympia CM726?
olympia CM 812 ?
Replacement Keys for Olympia S2200 register?
Where can I source a spindle for an Olympia CM1810+ cash register?