While you wait for answers, we may have found some information which could help you.
Click here for Olympia Register Cmhow to set time and date on olympia CM726?
Where can I source a spindle for an Olympia CM1810+ cash register?
olympia cm 812 ?
how do i change the time on olympia 721 cash register?
Typo in cash register - po 15150 iso 150?
How to fix my Olympia CM701?