There are no extraordinarily scarce circulation-quality Kennedy halves. Too many have been made too recently, and there are no known errors or significant varieties.
The highest value JFK halves are silver matte proof issues from the 1990s (called SMS, not to be confused with Special Mint Set halves from 1965-67) that retail in the $150 range.
The only bicentennial halves worth more than face value are those with "S" mintmarks and those in mint packaging. If you have a copper-nickel proof it is worth about $1-2 or so if uncirculated, if you have a 40% silver uncirculated/proof coin it is worth about $4.50 for the silver content.
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Bicentennial half dollars are worth 50 cents, if that's what you're asking.
All U.S. half dollars minted in 1975 and '76 featured the bicentennial reverse and were dated 1776-1976. The same applies for quarters and dollars.
All circulating bicentennial Kennedy half dollars are worth 50 cents.
Please check the date again. All dual-dated half dollars are 1776-1976. No half dollars carry the date 1975.
The other part of the date is 1976. This is a bicentennial Kennedy half dollar and it's only face value.
The only Kennedy half dollars to have a reverse of Independence Hall were struck for the Bicentennial with the dual dates 1776-1976. The coins were issued in 1975 & 1976.
The last Liberty Head half dollars were made in 1916. If you have a Bicentennial half with Independence Hall on the back, it's a Kennedy half.
1971 Kennedy half dollars are face value only and are still in circulation.
What do you mean by the wrong date? Bicentennial half dollars are only worth 50 cents.
0. Kennedy half dollars in 1964 contain 90% silver. Kennedy half dollars dated 1965-1970 contain 40% silver. 1971-present half dollars contain no silver unless they are in special silver mint sets.
Kennedy is on the HALF dollar, not dollar. There were no U.S. silver dollars minted in the 1960s. The '64 Kennedy half is 90% silver and extremely common, currently worth about $10.50 for the silver.
1964, the year after Kennedy died.