The 1981 S U.S. Mint Proof Set includes six coins in their original government packaging (OGP). These uncirculated coins have a copper composition and were struck as proof in San Francisco. Each coin is individually certified by the U.S. Mint, showcasing the craftsmanship and quality of American coinage from that year. This set offers collectors a complete selection of varied denominations from the United States, making it a desirable addition to any numismatic collection.