The Three Ball series of allwins (3 Ball Forks, 3 Ball Seven Win and 3 Ball Nine Cup) were introduced very late in the day. They attempted to entice players back from the bells and whistles of electro-mechanical games with three shots for a penny plus an automatic jackpot. Innovative design included the method of separating the balls and lifting them to the firing position and an automatic, self-metering jackpot. Operators could set the maximum jackpot and individual payouts. Get a ball in the cup to win; three consecutive wins takes the jackpot. Complexity made it expensive to produce, by the '60s all-mechanical slot machines were considered passé, and from an operator's standpoint, game play was too slow. This is the rarest of the three games.