The 1987 US Mint Prestige Proof Set is a highly sought-after coin collection featuring a Silver Dollar coin with a fineness of 0.9. Minted by the U.S. Mint in San Francisco, this set includes various denominations of coins in pristine proof condition. Each set comes with a Certificate of Authenticity and is considered an original product. This collectible set is a valuable addition to any coin enthusiast's collection, showcasing the artistry and craftsmanship of the United States Mint.