This set of US Mint Premier Silver Proof Sets includes the years 1992, 1995, 1997, and 1998. The coins in this set are in pristine condition, and are made of 100% silver. Each coin is a proof strike, and was minted at the San Francisco location of the US Mint. The coins come with a certification from the US Mint, ensuring their authenticity. This set is a must-have for any serious collector of US coins.