Kennedy Half Dollars

Kennedy Half Dollars have been minted since 1964. There have been a number of changes to composition starting with 1964 which is 90% silver, 1965-70 is 40% silver, 1971-Now are copper-nickel clad, while proofs minted from 1992-Now are minted in both copper-nickel and 90% silver. There are also 1976 40% silver bicentennial issues.