Half dollars used to be common, until 1964 they had Ben Franklin on one side and the Liberty Bell on the other. In 1964, President Kennedy's portrait went on the half dollar. People hoarded them and they became a treasured American coin, both because Kennedy was admired, and because the 1964 silver dollar was to be the last "genuine" silver dollar. Because so many people collected 1964 Kennedy half-dollars, the mint released more of them than any other half dollar. Congress even froze the date, and 1964 half dollars were minted in 1965, too.
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