This 40% silver Kennedy half dollar was the last silver-content coin used in American commerce! Since the 1970s, the U.S. Mint had issued 90% silver coins as a hard-asset foundation for the American economy. But in the 1960s, the market price of silver exceeded the coins' face value. Therefore, after 1964 the Kennedy half dollar was the only regular U.S. precious metal coin, and it was struck with just 40% silver content. When the cost of silver rose again in 1970, the U.S. Mint cancelled the JFK half dollar circulation issues completely. The 40% silver Kennedy halves were only retained in the year's limited-mintage proof and mint sets. From that time forward, all circulation coins were copper-nickel clad. We've acquired a number of these beautiful Final Silver proof half dollars that were once part of complete U.S. proof sets. Each features impressive minting with frosted etchings and mirror-like backgrounds.