The 2011 Silver Proof Set from the US Mint includes 14 coins in original packaging with a Certificate of Authenticity (COA). Featuring coins minted in San Francisco with a proof strike type, these silver coins are uncirculated and bear the mark of the U.S. Mint's certification. This set is a valuable addition to any coin collection, showcasing the craftsmanship and precision of American coinage from the year 2011.