1794-1795 Flowing Hair Half Dollar. Made of Silver.
1796-1807 Draped Bust Half Dollar. Made of Silver.
1807-1839 Capped Bust Half Dollar. Made of Silver.
1839-1891 Seated Liberty Half Dollar. Made of Silver.
1892-1915 Barber Half Dollar. Made of Silver. Also known as Liberty Head Half Dollar.
1916-1947 Walking Liberty Half. Made of Silver.
1948-1963 Franklin Half. Made of Silver. Benjamin Franklin on one side, Liberty Bell on other. Sometimes called Liberty Bell Half.
1964 Kennedy Half. Made of 90% Silver. President Kennedy on one side, Eagle on other.
1965-1970 Kennedy Half. Clad coin, 40% Silver clad to copper core. Same design as previous.
1971-Present Kennedy Half. Clad coin, copper core sandwiched with two layers of Nickel. SPECIAL ISSUE for bicentenniel in 1976. Some bicentenniels are Silver Clad. Mint mark is "S" on these.