The composition of the 1964 Kennedy half-dollar is notable for its 90% silver and 10% copper makeup. This specific alloy grants the coin intrinsic precious metal value, exceeding its face value as currency.
The presence of a substantial amount of silver in this particular mintage year contributes to its appeal among collectors and investors. Its historical significance arises from being the only year the Kennedy half-dollar was struck with this high a silver purity, making it a tangible link to a specific era of United States coinage and monetary policy. This characteristic has fueled interest in both numismatic and bullion markets.