These United States Mint Proof Sets are a must-have for any coin collector. The coins are uncirculated and come with a Certificate of Authenticity (COA). The set is perfect for anyone who wants to add some unique coins to their collection. The proof coins have a striking appearance and the set includes a variety of denominations. This set is a great addition to any collection and is sure to impress. 2007 and 2008 come complete with all 14 coins and 2009 is complete with all 18!