Collectible coins, particularly in the context of United States currency, often include special issues and denominations that attract numismatists. The Kennedy Half Dollar, introduced in 1964, commemorates President John F. Kennedy and is particularly sought after in certain years. The 1970 Kennedy Half Dollar, minted in San Francisco, is notable because it was produced as a proof coin and not intended for circulation, making it rarer than most other years. Collectors often seek these coins for their historical significance and limited availability.

Item Denomination Series Year Mint
1970-S (San Francisco) Kennedy Half Dollars 50¢ (Fifty Cents) Kennedy Half Dollars 1970 San Francisco