This 2011 United States US Mint Silver Proof Set is a must-have for any collector. The set includes a stunning silver composition, struck in San Francisco with a fineness of 0.9. It's a beautiful, ungraded coin that is perfect for anyone looking to expand their collection. The set comes with a box and COA, making it a great addition to any coin lover's collection. This special addition will make your collection stand out among the rest.