Based on general numismatic knowledge, as the provided context is limited to source titles and navigation links, the value of a 1971 U.S. half dollar depends primarily on its condition and mint mark. The year 1971 is significant as it was the first year the Kennedy half dollar was struck in a copper-nickel clad composition for circulation, meaning it contains no silver.
A standard 1971 half dollar that has been in circulation is very common and is typically worth only its face value of 50 cents. These coins were minted in large quantities by both the Philadelphia Mint (no mint mark) and the Denver Mint (a "D" mint mark found on the obverse, above the date). Due to their high mintage and lack of precious metal content, they do not carry a premium in circulated grades.
However, a 1971 half dollar in uncirculated, or mint state, condition is worth more than face value to collectors. Depending on the specific grade, these coins can be worth a few dollars. The higher the grade, which indicates fewer scratches and a stronger strike, the higher the value.
Additionally, the San Francisco Mint produced proof coins for collectors in 1971, which are identifiable by an "S" mint mark. These proof coins were not intended for circulation and feature a special mirror-like finish. A 1971-S proof Kennedy half dollar is generally worth a few dollars, though its value also depends on its condition. In summary, a circulated 1971 half dollar is worth face value, while uncirculated and proof versions carry a modest premium.
