1964 JFKs, Franklin, Walking Liberty, and Barber halves all weighed 12.5 gm when new and were made of an alloy of 90% silver / 10% copper. That means they contained 0.90 x 12.5 = 11.25 gm of pure silver.
Halves dated 1965-1969 are 40% silver, and circulation halves dated 1971 or later have no silver at all, just copper and nickel.
Kennedy half dollars minted from 1965-1970 are 40% silver and contain 0.1479 of a troy ounce of silver. Special collector editions of the Bicentennial coin (all of them have an "S" mintmark, but not all "S" mintmark bicentennial coins are silver) are also 40% silver. From 1992-present the US mint has struck special 90% silver proof sets including the Kennedy half dollar. Keep in mind that most proof sets are not silver and the half dollars in them contain no silver. But the 90% silver proof half dollar contains 0.3617 troy ounces of silver.
80% or 0.36169 ounce's.
The coin is only 40% silver and has a value of $2.73 only the 1964 Kennedy half dollar was 90% silver.
The actual amount of pure silver is .36169 of an ounce.
1964 Kennedy halves are the most common 90% silver half dollars. Most are valued just for the silver, about $12.00.
All U.S. half dollars from 1840 to 1964 contain .36169oz of silver.
If it's 1964 or earlier, it's 90% silver. 1965-70 are 40% silver. 1971-present have no silver.
The U.S. Mint did not issue any .999 silver Kennedy coins in 1964.
The weight of the U.S. silver half dollar has changed over the course of it's history. In 1794 the silver half dollar weighed 13.48 grams and was 89.24 % silver. Then in 1836 the silver half dollar weight was changed to 13.36 grams and was 90% silver. In 1892 the silver half dollar weight was again changed to 12.50 grams which was the weight used until the final 90% silver half dollar struck for circulation was issued in 1964.
Sorry, no circulating US $1 coins were struck in 1964 at any US Mint. The coin is a Half Dollar with a value of about $13.00 for the silver as of 07/2011.
4-11-11->> 1964 Kennedy half dollars are very common, most are valued only for the silver about $13.00
7-1-11>>> Sorry, no US $1 coins were struck in 1964 at any US Mint. The coin is a Half Dollar with a value of about $12.00 just for the silver.
It's a half dollar not a dollar. The coin is very common, most are only valued for the silver, about $12.00