Pre 1964 90% Kennedy Silver Half Dollars

The Kennedy Half Dollar design is the eighth overall design for the US half dollar and the current design still in use today.Every coin in this denomination prior to 1964 had 90% silver content. However, 1964 was the last year for all denominations to feature 90% silver. As 1964 was the debut date mark of the Kennedy Half Dollar, that makes it the only Kennedy Half Dollar date mark with 90% silver.