This 2005 United States Mint Proof Set is the perfect addition to any coin collector's collection. The set includes proof coins that have not been circulated, struck in San Francisco, and composed of copper. The coins come with a Certificate of Authenticity and a box, making it easy to store and display your collection. The set is ungraded and was minted in the United States, adding to its unique value. Overall, this proof set is a great investment for any collector looking to add some special pieces to their collection.