Place on auction and see what the market will bear.
This is a very common date for Mercury dimes. If it has any wear at all the value is for the silver, about $2.00.
The Monetary Value is 10 cents. The intrinsic value is about $2.50. The numismatic value is $3.00.
The value is $3 if it is in mint condition. $2 if circulated.
a 1942 Mercury Head dime is very common, if it has any wear the value is for the silver about $2.00.
The first MERCURY dime was struck in 1916
The "aw' you see is just the monogram of the designer Adolph Weinman, it's on every Mercury head dime. 1942 is a very common year so if the coin shows any wear at all the value is about $2.00 just for the silver.
Mercury Head dimes dated from 1940 to 1945 regardless of mintmarks (if any) are very common. Coins in average circulated condition have a retail value of $3.00
That generic description could apply to both a 1942 half-dollar and a dime. Please see the appropriate question for more information: "What is the value of a 1942 US half dollar?" "What is the value of a 1942 Mercury dime?"
1942 is not a rare date for Mercury dimes. In circulated condition, it has about 75 cents worth of silver in it. A nice uncirculated one is worth about $5
Retail values for circulated coins are $2.00-$3.00 Mint state coins are $5.00
It ranges from $1.50 to $400.
Average retail value of a VF Mercury dime is $3.00. As of 3-23-11 the silver value is $2.60 for each coin.