some states of the America still have these as illegal items if operational,
however most states allow them under vintage slot machines for collectors.
There were more sinister mini slot machines of this type
one was a mills vest pocket slot machine.
These were very popular with the mafia in the 30 and 40's.
They about the size of that machine above but it payed out cash also just like a full size slot machine.
It would have been jail time if you were caught with one of those so they were small enough that they could be moved on a police raid on a gambling house or bar.
They are very popular with collectors now because of the history