The 2017 225th anniversary Enhanced Quarter Set is a special collection of coins issued by the U.S. Mint to commemorate the anniversary of the United States Mint. This set includes uncirculated quarters minted in San Francisco in 2017. Each coin is not graded, making it a valuable addition to any coin collection for collectors interested in US coins and Mint Sets. The set is a unique and limited edition piece that celebrates a significant milestone in American numismatics.