The product is a lot of 8 original unopened United States proof sets from 1973. Each set contains uncirculated coins with a clad composition, struck in proof condition at the San Francisco Mint. These sets are certified by the U.S. Mint and are a valuable addition to any coin collection, showcasing the craftsmanship and history of American coinage. Ideal for collectors looking to expand their US coin set, these sets offer a unique glimpse into the past of United States coins.