The United States Mint Proof Sets 1988-1989 + Presidential $1 Coin Proof Set contains coins with a denomination of $1, composed of copper and silver with a fineness of 0.9. These proof sets include coins struck in proof quality from the years 1988 and 1989 at the San Francisco Mint. This collection is a valuable addition for collectors or those interested in US coins, especially highlighting important historical figures with the inclusion of the Presidential $1 Coin. Please see photos for aging wear & tear and any tarnishing.