In 1963 Bally converted the console to a casino slot, refined the hopper payout, and created a front opening case. That was the formula for success.
In 1968, Bally introduced the Model 831, the first three line payout slot machine. The multi-coin, multi-line slot machine is still the standard today, 3o years later. Needless to say, with these innovations, Bally took over the slot business and drove the giants, Mills and Jennings, virtually out of the business.
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