The US Coins 1987 S United States Proof Set includes a collection of uncirculated coins with a composition of CN-Clad. Mounted in a Hard Plastic Dis[play Case. This set features coins with denominations ranging from 1 cent to 50 cents and is struck in a proof finish at the San Francisco Mint. Each coin is certified by the US Mint and comes in its original box with a Certificate of Authenticity. This set is a valuable addition to any coin collector's portfolio.