The 1991 Mount Rushmore Anniversary 2 Coin Proof Set is a commemorative collection from the United States Mint. This set includes two coins, one featuring a $1 denomination and the other a 50 cent denomination, both composed of modern silver and clad materials. The coins are uncirculated and struck in proof quality, making them valuable additions to any coin collection. Each coin is certified by the U.S. Mint and comes with a Certificate of Authenticity, adding to the historical significance of this set in honor of the Mount Rushmore anniversary. thank you for looking. Please check out the other items have it for sale in the Triple T Treasure store.