1960 United States Mint Silver Proof Set In Original Goventment Packaging, 5 Coins - Manilla Envelope. 1960 Small Date United States Mint Proof Set with 5 coins. "Post-War" proof sets from 1950 to 1964 were produced exclusively at the Philadelphia Mint. All contain a set of 5 coins, including the Lincoln Cent, Jefferson Nickel, Roosevelt Dime, Washington Quarter, and Franklin Half Dollar -- with the exception of the 1964 set, which is the first to contain a Kennedy Half Dollar and the last to be produced in Philadelphia. No mint proof sets were produced from 1965 to 1967.