Check the listing for details. 2004 US Mint 50 State Quarters Proof Set Original Packaging w/COA. Made in United States. Listed at 5.00 USD. The 2004 US Mint 50 State Quarters Proof Set includes uncirculated 25 cent coins made of clad composition. Each coin is struck in proof condition at the San Francisco Mint, with original packaging and a Certificate of Authenticity from the U.S. Mint. This set features coins highlighting each of the 50 states in the United States, making it a valuable and collectible addition to any coin enthusiast's collection.