This 2008 US Mint Proof Set includes 14 Clad coins featuring National Park Quarters and Presidents with a Certificate of Authenticity. The coins are in pristine condition and have never been circulated. The set includes coins of various denominations and strike types, all of which were made in San Francisco. The U.S. Mint certification guarantees the authenticity of these coins that were manufactured in the United States and are a great addition to any coin collection.