Look at the coin again, it's a Walking Liberty half dollar not a dollar and is a very common date with low retail values of $15.00-$16.00 for most circulated coins.
No US dollar coins exist dated 1942.
It's a Walking Liberty Half Dollar not a Standing Liberty half dollar and the value is about $6.00
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?"
Just for its silver content alone it would be worth about $10.40.
If the coin has any wear the value is for the silver about $12.00
Please check the back of the coin. You'll find that it's a HALF dollar. See the Related Question for more information.
All half dollars dated 1947 and earlier carry a picture of Miss Liberty.
If the coin has any wear the value is for the silver about $12.00
The 1942 Walking Liberty half dollar is a very common date coin of the series. Average circulated coins are value at $17.00-$18.00
It's a very common date. At present, it's worth around $10.
All Walking Liberty half dollars have the same silver content of .36169oz pure silver
There is no such thing as a 1942 Canadian silver dollar.
Walking Liberty Half Dollars will never have a "W" mintmark. Instead, that is the designer's signature. If your Walking Liberty Half Dollar has a mintmark, it will be on the left side of the coin near the branch that the Eagle is perched upon. 1942 was a common year of Walking Liberty half dollars and they are worth about $12.75 for their silver content, unless the coin is in mint state, in which case the coin might be worth more to a collector.