Just 2 years after the mint switched from 40% silver to a blend of 91.67% Copper 8.33% Nickel. Errors include obverse die breaks, struck on nickel planchet, struck on quarter planchet, off center strikes up to 70%, double strikes, and clipped planchets Most Valuable Errorsġ972 was another rough year for the United States mint. These coins are a copper-nickel composition, being a nickel jacket over a copper core. Anything after 1970 contains no silver, with the exception of errors listed below. This was only the second year that the US Mint issued Kennedy Half Dollars in a non silver state. If no mint mark is present it is a P and was minted in Philadelphia. The mint mark for the 1972 Kennedy Half Dollar is on the Obverse/Front.
