The Only 90% Kennedy Half Dollars Ever Released For Circulation - Accented in Pure Gold! In 1964, the United States Mint made history when it issued the Kennedy Half Dollar in memory of our former President, just one year after our beloved President's passing. However, due to rising silver prices throughout the 1960s, the United State Mint was forced to stop issuing 90% silver coins for circulation at the end of the year. As a result, the 1964 Kennedy is not only the first Kennedy....but also the last and only made out of .900 fine silver. We've enhanced this Silver Gem Brilliant Kennedy Half Dollar from the first year of issue by layering them in pure 24 Karat Gold and presented in our custom display lens.