Not all silver. It is referred to as silver clad. Silver on both sides (40% by weight) with copper in the center. The semi-solid silver Kennedy half dollar stopped production in 1964, made of 90% silver. See the related link for more information.
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40% silver 60% copper
The usual advice when someone suggests cleaning a coin is to say NO, NEVER! because cleaning destroys a coin's collectible value. But 1967 Kennedy halves are valuable only for the small amount (40%) of silver they contain, so if you want to use a product like Tarn-X or similar, you won't harm its metal value. The coins are still common among collectors so the chances that you could sell it for more than its metal value are extremely low.
All 1964 JFK halves were struck in an alloy of 90% silver and 10% copper. 1964 was the only year for that composition. 1965-70 halves were struck in a 40%-silver clad composition. All circulating halves dated 1971 and later have no silver; they're made of the same copper-nickel "sandwich" metal used for dimes and quarters.
No 1977 halves were struck in silver. It's also very difficult to tell by a coin's ring because clad coins are frequently irregular internally due to thickness differences that occur as the clad stock is rolled out. Look at the coin's edge. If it's copper-colored like the edge of a quarter or dime, you have an ordinary copper-nickel circulation half that's worth face value.
There are .1479 troy ounces of silver in a 1967 US Kennedy half dollar.
Please turn the coin over and check the denomination. It's a HALF dollar.
A 1967 Kennedy half dollar is only 40% (.14792oz) silver. Current spot price of silver is $32.06 it's intrinsic value is $4.74. A buy offer should be about $3.00 for a single coin.
The 1967 Kennedy half dollar is a 40% silver coin, value is about $5.00. The coin is very common.
At current silver prices, it's worth about $5. Kennedy halves dated 1965-70 contain 40% silver.
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.
4-22-11>> The 1967 Kennedy half is a 40% silver coin and is very common, most are valued just for the silver, about $6.00. NOTE: All Kennedy halves from 1965 to 1970 are 40% silver and circulated coins have the same values.
The 1964 Kennedy half has .36169oz of pure silver in it.
As of 19 March 2016, 40% silver Kennedy halves (1965-70) are worth $2.34.
The 1964 Kennedy half dollar contain 11.25 grams of silver. Kennedy half dollars from 1965 through 1970 contain 4.60 grams of silver.
The 1967 Kennedy half dollar is a 40% silver coin (1965-1969) but so many were made only a very high grade uncirculated example is worth more than the silver in the coin. The silver value today is about $4.00
A 1969 silver Kennedy half dollar is worth $5 inn perfect condition. The value of the silver is worth $2.87.