Players pulled the lever which spun the reels. spinning reels featured 10 symbols apiece. Mechanical slots were made from cast iron. When players were fortunate enough to land 3X Liberty Bell symbols on the middle payline, a jackpot prize of 10 nickels was awarded to players. It included rudimentary symbols such as hearts, diamonds, and spades, and a cracked Liberty Bell. This classic 3-reel slot was a mechanical slot with 3 spinning reels. Think of the Liberty Bell slot by Charles Fey, introduced in 1894. For those who don’t know, mechanical slots were the mainstay when slot machine games were introduced to the world.