All Walking Liberty half dollars were made of 90% silver, but 1940 is not a rare year. In lower grades the coin's value is mostly determined by the value of the silver it contains.
Look on the back of the coin to see if there's a small mint mark letter at roughly the 8:00 position. It may be blank or there may be an S. (The W on the front of the coin is the designer's monogram and not a mint mark.)
Numismedia lists the following approximate retail values as of 04/2011:
No mint mark (Philadelphia):
Very worn condition - $14
Moderately worn - $14
Slightly worn - $15
Almost no wear - $19
Uncirculated - $37 to $5,920 depending on quality
"S" mint mark (San Francisco):
Very worn - $14
Moderately worn - $14
Slightly worn - $15
Almost no wear - $23
Uncirculated - $47 to $6,860
DISCLAIMER: The retail values quoted are the best available as of the date shown, but may vary significantly due to changes in the precious metals market. Also the wholesale (buying) price of a coin will be less than the selling (retail) price. A reputable coin dealer will be able to give a more accurate valuation based on inspection of the coin.
There was no fifty dollar US gold coin produced in 1940.
50$
Value is for the silver about $2.50
The US didn't strike any half dollars in 1804.
50 cents.
There was no fifty dollar US gold coin produced in 1940.
50$
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.
It has a metal value of about $10.
Value is for the silver about $2.50
About $4-5
50 cents.
a half dollar
The US didn't strike any half dollars in 1804.
A U.S. half dollar dated 1953 or 1952 is a Franklin half dollar. If it shows any wear, the value is only for the silver, about $10.00. The coins are very common.
A US half dollar with a date of 1983 is a Kennedy half dollar not a liberty half dollar.The coin has no silver and most are only face value.
The value of a US 1964 half dollar in circulated condition is around $10. in uncirculated condition they are worth around $16.