The gold plate is just a novelty, and actually considered damage by coin collectors. You have about five dollars of silver here.
📋 Item Submitted
Gold 1964 half dollars
M
Marc's Expert Appraisal
ANA-Certified Numismatist · Hudson Valley Numismatics
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11 Kennedy half dollars (years ranging from 1964, 1965 to 1979) 2 silver dollars…
Silver dollars, $25 retail. 1964 Half, $8. 1965-70 halves, $8. The rest, face value.
Kennedy half dollar double die would like a second opinion
Yet another 50c. Where is all this double die nonsense originating from?