1980 - 1989 TEN Annual United States Mint Proof Sets 57 Coins Lot of 10 Complete This product is a lot of 10 complete 1980-1989 United States Mint Proof Sets, containing a total of 57 coins. The coins are all uncirculated and composed of copper, struck as proof sets in San Francisco. Each set includes coins with assorted denominations. These sets are a valuable addition to any coin collection, representing a piece of American numismatic history from the 1980s.