United States coinage produced in 1964 featuring a specific denomination and composition holds significant historical and intrinsic value. The coins, with a face value of fifty cents, were minted using a 90% silver alloy. These particular pieces represent the last year this precious metal was used in circulating U.S. half dollars. A typical example would be a Kennedy half dollar with a date of 1964.
The importance of these coins lies in their silver content, which provides them with a melt value that fluctuates with the silver market. Furthermore, the cessation of silver usage in subsequent years has imbued these coins with numismatic appeal. Their historical context is tightly linked to the Coinage Act of 1965, which removed silver from dime and quarter production, and reduced its proportion in half dollars to 40%, before eliminating it entirely in 1971 for circulating coinage. Thus, the 1964 issue marks a turning point in United States currency history.