Quoted from Sea_Wolf:1968 Williams Lady Luck. Lots of fun and a pretty machine.
I'd second this. What I like about it is that the rules are so different from what I'm familiar with. From what I recall on each ball you're trying to beat the dealer in a round of Black Jack. The dealer's score changes with each ball but isn't revealed until you drain so you're trying to get 21 or as close to it as you can without going over. At some points in the game it makes strategic sense to drain if you have 21 for example rather than keep playing and go bust.
/Mark