Uncirculated - $6 to $425 depending on quality Numismedia lists the following approximate retail values as of 08/2014: (The W on the front of the coin is the designer's monogram and not a mint mark.)
It may be blank or there may be a D or S. Look on the back of the coin to see if there's a small mint mark letter next to the E in ONE. In worn condition their retail value is about 0.18 X the current price of silver a metal dealer will pay less. 1942 is a very common date for Mercury dimes.
