There's no US half dollar with those dates. The only dual-dated halves were the Bicentennial coins that carry the dates 1776-1976
If you have a copper-nickel half dollar dated 1974 it's only worth face value.
None of the Bicentennial coins regardless of denomination or mintmark struck for general circulation contain any silver or have more than face value. Only proof and uncirculated collectors coins sold from the Mint have premiums
If you found it in your pocket change, fifty cents.
Proof coins directly from the mint might be worth slightly more, but half dollars since 1970 are not really "rare" in any sense of the word, and the bicentennial ones were so obviously "collectible" that everyone hoarded them, so your Uncle Joe (and, more to the point, everyone else's Uncle Joe) probably has a drawer full.
Half dollars minted before 1971 contained some silver and have mostly been taken out of circulation and melted down, so intact specimens of those are worth more.
These coins were issued for the US Bicentennial so you'll find that the date is actually 1776-1976. There's more information at the Related Question.
It's still worth 50 cents. None of the bicentennial coins are rare or worth more than face value.
50 cents.
Check that coin again. Kennedy wasn't put on the half dollar until 1964.
No 1963 Kennedy half dollars exist. 1963 is the last year of the Franklin half dollar. 1964 is the first year for Kennedy.
the 1972 Kennedy half dollar is worth 50 cents in circulated condition, or about a dollar in uncirculated condition
A 1969 silver Kennedy half dollar is worth $5 inn perfect condition. The value of the silver is worth $2.87.
If you got it in change, spend it. It's just a half dollar.
.50
50 cents.
Sorry it only has face value.
The 1969 Kennedy half dollar is only 40% silver with a value about $3.25
A US half dollar with a date of 1979 is a Kennedy half dollar not a liberty half dollar. The coin has no silver and is only face value.
A Mint State 1971 Kennedy has a retail value of $1.00-$2.00
50 cents.