This date is one of the less-common coins of that series, called Barber halves after their designer Charles Barber. Look on the back of the coin to see if there's a small mint mark letter below the eagle. It may be blank or there may be an S.
Numismedia lists the following approximate retail values as of 06/2010:
No mint mark (Philadelphia):
Very worn condition - $110
Moderately worn - $270
Slightly worn - $480
Almost no wear - $930
Uncirculated - $1,230 to $16,250 depending on quality
"S" mint mark (San Francisco):
Very worn - $17
Moderately worn - $52
Slightly worn - $108
Almost no wear - $389
Uncirculated - $660 to $11,380
1914 would have made it a Liberty head (or Barber) style half dollar. Pictures can be found online.
Please check your coin again and post a new, separate question. Walking Liberty halves were minted from 1916 to 1947. A 1914 US half dollar would be a liberty-head design called a "Barber" half, after its designer Charles Barber.
50$
Value is for the silver about $2.50
The US didn't strike any half dollars in 1804.
1914 would have made it a Liberty head (or Barber) style half dollar. Pictures can be found online.
Please check your coin again and post a new, separate question. Walking Liberty halves were minted from 1916 to 1947. A 1914 US half dollar would be a liberty-head design called a "Barber" half, after its designer Charles Barber.
50$
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.
Please don't assume that every old bill is a silver certificate. 1914 $20 bills were issued as Federal Reserve Notes, not silver certificates. There's more information at the question "What is the value of a 1914 US 20 dollar bill?".