Slot machines are one type of casino game.
One of the reels from the slot machine is turned into a ring.
While modern slot machine symbols are popularly decorated with cherries and the number 7, the first machine made, called the "Liberty Bell," featured lucky motifs such as a horseshoe, star, spade, heart, bell, and diamond.
The motif runs around the entire ring, with a diamond in the horseshoe and the charm "Hit the jackpot" engraved on the inside of the ring.