Group of 2 United States Mint Proof Sets 1974-1975 12 coins. Group of 2 United States Proof Sets 1974-1975 12 coins. Each set contain 6 coins, the Eisenhower Dollar, Kennedy Half Dollar, Washington Quarter, Roosevelt Dime, Jefferson Nickel, and Lincoln Cent. The 1975 Proof Set contained three coins dated 1976. This was a result of the newly designed coins minted to celebrate the Bicentennial of the United States. The Eisenhower Dollar, Kennedy Half Dollar, and Washington Quarter all carried a special reverse design and carried a dual date “1776-1976.” These bicentennial coins were struck during 1975 and 1976.The 1975 Set included the Roosevelt Dime, Jefferson Nickel, and Lincoln Cent, which bore the 1975 date. A number of 1975 Proof “No S” Roosevelt Dimes were produced, we had not check for this special coins. It is the scarcest of the “No S” Proof Coins and is extremely expensive, trending pr66 at $350,000!!!. The packaging remained the same as the prior year, with the coins sealed in plastic rings within a rectangular plastic holder with red felt background. The plastic case had an outer black plastic cover, which opened and closed on a hinge. This was put into a black cardboard box within silver printing describing the contents.