penny press machine
It is said that the first pressed penny appeared in 1892. What the machine does is, it has the reversed image of the design, sort of like a mold. So when the user cranks the handle, the coin (not the coin you inserted) is fed in and is pressed under great pressure until it becomes oval in shape, and with new imprints on it.
This is the end product. Didn't photoshop to skew it ok!
Users get to choose from the 4 available designs on the same machine. Do check it out if you are curious!



















Uh. I dont think its random, you need to twist the dial to choose the design you want and then twist the crank to let it out.
Or maybe the one I saw is different to that one :P