The 1981-S United States Mint Proof Set is a collectible item that includes uncirculated coins struck in proof condition at the San Francisco Mint. This set features coins from the United States with a U.S. Mint certification, making it a valuable addition to any coin collection. The set is from 1981 and contains coins of high grade, reflecting the quality and craftsmanship of that year's minting. This product is a sought-after item for collectors interested in United States coins.