1992 United States Mint Proof Set 5 coins. 1992 United States Proof Set 5 coins. The Set contains 5 Proof Coins, the Kennedy Half, Washington Quarter, Roosevelt Dime, Jefferson Nickel, and Lincoln Cent. Each coin was struck at the San Francisco Mint and carried the “S” mint mark. The packaging for the Proof Set was themed in purple. The coins were held in place within slots of a purple cardboard holder sealed in a plastic lens. This lens was placed in an outer purple cardboard box with silver printing on the outside.