PM 10 Punching Machine

I received this punching machine in a box of machine knitting items given to me.  It was filthy and I didn't even know if it worked or how it worked.  Found this handy video that got me started.  Still not sure if it works.  Got the tray that holds the card to stop willy nilly sliding back and forth and now it's stuck at the beginning and won't move.  Time to give it a good clean, open her up and see what's going on.  Looks like it would be a pretty fun and handy tool to have.