Hi there the CM721 Olympia Cash Register . It is a fairy oldish model so you might struggle to get the ink roller. If you do then ask them for a Royal 435 Ink roller it is the same . If you look where you put the paper in the unit you will see the printer unit. There is an ink Roller that needs to be replaced on the top of the printer unit it has a little flap and lifts up from left to right. It normally uses an IR40 Ink Roller.
louise Wepener (Royal Cape Town), August 2009