1956-1959 Silver Proof Set Run in Original Government Packaging, 20 Coins Total, 4 Complete Sets. 1956-1959 Proof Set Run in Original Government Packaging, 20 Coins Total, 4 Complete Sets. The "Post-War" Proof Sets were produced from 1950 to 1964, and contained a Lincoln Cent, Jefferson Nickel, Roosevelt Dime, and Franklin Half Dollar. 1964 was the final year that the Philadelphia Mint produced proof sets, and was the first year of the Kennedy Half Dollar, which replaced the Franklin in the proof set. From 1965 to 1967, all mints produced coins without mint marks, as a shortage of coins was blamed on coin collectors. No proof sets or uncirculated mint sets were produced by the mint in those years, and instead "Special Mint Sets" were produced.