It's a relatively common date, worth around two dollars on average, or more if it's in nicer condition.
1939 is a common date for Walking Liberty halves. Most circulated coins are valued for the silver, about $12.00.
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To a collector, whatever he's willing to pay. To a coinshop, its weight in scrap silver only. Check silver prices.
it is worth about 50 dollars
Liberty nickels were made from 1883 to 1912. Your coin is a familiar Jefferson nickel. Please see the question "What is the value of a 1939 US nickel?" for values.
Your coin is a familiar Jefferson nickel rather than a Liberty nickel, and it isn't made of silver. Liberty nickels were made from 1883 to 1912, and popular mythology to the contrary, nearly all US nickels are made of an alloy of copper and nickel, with no silver at all. The only nickels that ever contained silver were minted during WWII. Please see the Related Question.
The coin is a 1939 Mercury Head dime and the lady is Miss Liberty. Your coin is 90% silver but the date is common. Circulated coins are $3.00-$6.00 and uncirculated are $10.00 or more depending on the grade of the coin.
If it the date is 1939 and it says "HALF DOLLAR" on the back then this is not a one-ounce bullion coin; they were first issued in 1986. It's an actual coin that was used in ordinary commerce. Its value is mostly determined by the current price of silver which changes every day. Check a site like kitco or CNNMoney for the current spot price of silver, then multiply by 0.36 for an approximate worth.
Assuming the coin is circulated and has no mintmark, the 1939 Winged Liberty Head dime is a common date coin. For an accurate assessment of value the coin needs to be seen and graded. Most coins show a lot of wear. In general retail values for low grade coins are $2.00-$3.00 and coins showing almost no wear run from $5.00-$8.00. Values are a market average and only for coins in collectible condition, coins that are bent, corroded, scratched, used as jewelery or have been cleaned have far less value if any to a collector or dealer
15.00
Check that coin again. There were no US silver dollars minted that year.
8-4-11>> The value today is about $7.00.