As the company commissioned by the NFL to make the Super Bowl flip coin for the past 10 years the Highland Mint has been granted the approval to go back in time and commemorate past Super Bowls.This unique match numbered souvenir coin collection commemorates the Oakland Raiders Championship teams of Super Bowl XI, XV, and XVIII. Each coin has a similar design of the current flip coins that includes dueling helmets, ribbons with team names and Super Bowl Commemoration on the front and the reverse of the coin features the Super Bowl Logo for that year as well as the date that the game was played.· Super Bowl XI: This coin features the NFL Shield as a replacement of the Lombardi Trophy and includes the score of the game on the front of the coin. Oakland 32 Minnesota 14· Super Bowl XV: This Coin features the NFL Shield as a replacement of the Lombardi Trophy and includes the score of the game on the front of the coin. Oakland 27 Philadelphia 10 · Super Bowl XVIII: This Coin features the NFL Shield as a replacement of the Lombardi Trophy and includes the score of the game on the front of the coin. Los Angeles 38 Washington 9 Each of the coins in the set is individually numbered to match. They are individually placed in clear protective capsules and presented in a Custom black velour jewelry box. A numbered certificate of Authenticity to match the numbered coins accompanies each set.