This lot includes 6 US Mint Proof Sets with COA from the years 1970, 1971, 1974, 1976, 1978, and 1979, totaling 34 coins. The sets are from the United States and have not been circulated. The coins are of proof strike type and have been certified by the U.S. Mint. They make a great addition to any coin collection and are perfect for collectors who appreciate the beauty and history of US coins.