It is still showing the correct date and time when powered up.
There is a sounder inside the lit in the middle. On the same board as the sounder there is space for three jumbo square LEDs, coloured red, green and yellow. Also in the lid there are two sets of 4 posts with threaded bushes for an option. I'm guessing this is for a wireless smart card reader. The LED options are probably to do with the card reader modules.
The case is completely symmetrical (apart from the front panel) so that the printing unit can be mounted on the left or right side of the machine for left and right hand drive vehicles.
It uses a thermal type printer and has a small guillotine to cut off the printed ticket.
There is a metal cover (Not shown in the photo) that drops down to cover the removable driver module. It's not lockable, but I assume it stops "passengers" grabbing the module and running off with it, or at least slows them down so the driver has time to stop them.