This set of 4 United States Mint Proof Sets includes the 50 State Quarters from the years 2004, 2005, 2006, and 2007. Each coin is in an uncirculated condition and struck with proof quality. The coins were minted in San Francisco, United States, and come with certification from the U.S. Mint. These coins are a must-have for any coin collector and are perfect for adding to your collection or as a gift for a fellow collector.