While you wait for answers, we may have found some information which could help you.
Click here for Register Open Salehow to set time and date on olympia CM726?
How can I change the date on a Olympia S2200 cash register?
how do i change the time on olympia 721 cash register?
how remove password on olympia cm721 plus?
olympia cm 1810 plus locked?
Where can I source a spindle for an Olympia CM1810+ cash register?