Group of 2 United States Mint Proof Sets 1992-1993 10 coins. Group of 2 United States Proof Sets 1992-1993 10 coins. Each 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.