The 1988 $ United States Proof Prestige Set is a 6-coin lot of uncirculated coins including a silver dollar with a fineness of 90%. Minted in San Francisco, these coins bear the proof strike type and come with a Certificate of Authenticity from the U.S. Mint. Each coin is a denomination of one cent to  $1 and is a valuable addition to any coin collection, showcasing the craftsmanship and quality of United States coinage from 1988.