N.C.R cash register
Ah Ronhic, then you must have used them as well in your past, the noises you quote are pretty spot on,the other thing which was good about those cash registers was the ability to operate them during a blackout,which happened frequently in the centre where my Woolies was located,you simply screwed a handle into the right side and another person could crank it after you pressed the price keys in.
Aahh! memories,and mostly happy ones at that.
Cheers.
Steve.