1895-Bell (Charlie Fey) invented the first commercial slot machine. It is made of cast iron by an internal three reel, a coin slot, an external handle turning machine. Slot machines soon became the main merchandise for bars, casinos, and even many retail outlets.
Thanks to the gold rush in San Francisco, many people are dreaming of gold. So there is a great interest in this amazing machine that makes one overnight rich, and soon the machine will be popular. With the progress of science and technology, has evolved into a variety of different models.