1992 United States Mint Prestige Proof Set 7 Coins W/ Box & COA. Product DetailsThis wonderful seven-piece set includes all of the proof issue coins of 1992 as well as a commemorative Olympic proof half dollar and Silver dollar in the original U.S. Mint presentation case.Set Highlights: Silver half dollar contains .7734 oz of 90% Silver. Dime, quarter and half dollar are clad. Comes in original box, and may or may not include a certificate of authenticity. Includes a proof example of the following: Lincoln Cent, Jefferson Nickel, Roosevelt Dime, Washington Quarter, Kennedy Half Dollar, Olympic Baseball Silver dollar and Olympic Gymnastics clad half dollar. Sovereign coins backed by the U.S. government.