The provided search result context is insufficient for determining the specific values of Kennedy half dollars, as it only contains navigational links from a pricing guide website. However, based on general numismatic knowledge, the value of a Kennedy half dollar is primarily determined by its year of mintage, metallic composition, and physical condition.
The most significant distinction lies in the silver content of the coins. Kennedy half dollars minted in 1964 are composed of 90% silver, and their base value is directly tied to the current spot price of silver, making them worth significantly more than their 50-cent face value. Coins from this year in uncirculated or high-grade condition command an additional numismatic premium above their intrinsic metal worth.
From 1965 to 1970, the composition was changed to a 40% silver-clad planchet. These coins also have a value above their face value due to their silver content, though it is less than that of the 1964 issue. Their worth is similarly influenced by the fluctuating price of silver, with collector premiums for examples in pristine condition.
Beginning in 1971, the composition of circulating Kennedy half dollars was changed to a copper-nickel clad alloy, eliminating all silver content. Consequently, most coins minted from 1971 to the present are generally worth only their face value of 50 cents if they show any signs of circulation. Uncirculated examples, often sourced from mint sets, may be worth a small premium to collectors. Certain special issues, such as proof coins or silver proof coins made for collectors since 1992, are struck in silver and have higher values based on their metallic content and numismatic demand.
