Kennedy

Succeeding the Franklin half dollar, the Kennedy half dollar is a coin of the United States first minted in 1964, the year following the assassination of President John F. Kennedy. It features the face of President John F. Kennedy on the obverse and an eagle on the reverse. The obverse was designed by Gilroy Roberts and the reverse was designed by Frank Gasparro. After the 1964 coin's introduction (around the height of the cold war), the Denver Mint received a number of complaints that the base of Kennedy’s neck bore the hammer and sickle symbol. However, closer examination will reveal that the mark is actually a script form of the initials "GR": Gilroy Roberts’ monogram. Bicentennial half dollars dated 1776-1976 were produced in the years 1975 and 1976 in the copper-nickel clad composition for circulation and proof and also in the 40% silver composition in uncirculated and proof versions for inclusion in special collector sets. When the United States Mint started producing silver proof sets in 1992, the Kennedy half dollar included in them had the same composition as the coins of 1964. -Wikipedia