Collectible coins, particularly from the United States, encompass a variety of types, including the 50 cent pieces known as Kennedy Half Dollars. These coins were first issued in 1964 and commemorate President John F. Kennedy. The 1971 Kennedy Half Dollar, minted in San Francisco, is notable for its S mintmark and is part of a series that continued to be produced in large quantities, including both circulation and proof versions. Collectors often seek coins based on rarity, condition, and historical significance.

Item Denomination Series Year Mint
1971-S (San Francisco) Kennedy Half Dollars 50¢ (Fifty Cents) Kennedy Half Dollars 1971 San Francisco