Skill stop switches preceded the Bally electromechanical slot machines of the 1960s and 1970s. They showed up on mechanical vending machine manufactured by Mills Uniqueness Co. as early as the mid 1920s. In the 1980s, nevertheless, vending machine manufacturers included electronics togel online into their products and set them to weight certain symbols. Thus the odds of losing icons appearing on the payline became out of proportion to their actual regularity on the physical reel.