Where Were You? Most Widely Collected Single Coin in History: Original 1964 Kennedy Silver Half Dollar, Brilliant Uncirculated. Sixty years ago tragedy befell the nation when President Kennedy was assassinated in November of 1963. As Americans grieved for the young leader, the U.S. Mint was at work preparing a new coin — and in just a few short months the 1964 Kennedy silver half dollar was released. Rushed into production when the loss was deeply felt, the original issue served as a memorial tribute. This first JFK coin — the only 90% silver date struck for circulation — remains the most popular single issue for collectors. Our choice of mint. Limit 5 per household.