During the Great Recession, a lot of Kennedy halves were being spent at the grocery stores. I’d glance into the till when I was checking out. Pretty easy to catch the sight of silver. I’d generally just ask for all of the halves. One kid picked up a Franklin half, looked at it, and said “That’s a funny color.”
The silver content of Kennedy half dollars is as follows:
1964 Kennedy half dollars: 90% silver and 10% copper.
1965 through 1970 Kennedy half dollars: 40% silver and 60% copper
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Did you get many 1964s? Though the 1965 through 1970 Kennedy half dollars have enough silver, to make them worthwhile for you, to scoop up that free silver.
Score!