If it is one of the rarer ones with the extra pearl on the crown, then it's worth a fair bit. There are other things to take in to consideration for its value such as the grade of the coin. In its worst grade it is woth a total of 9 dollars and change in just for the silver value.
About $2.00 only for the silver.
1966 Kennedy half dollar is 40% silver and valued at about $2.50 for the silver.
A 1962 half dollar is 90% silver. The circulated value is $7.01 because of the silver content. The uncirculated value is $20.
The coin is very common, most are valued for the silver only at about 5 dollars. 1964 was the last year for 90% silver coins.
Unless it's a high grade uncirculated coin it's value is bullion, that as of today is $6.60 just for the silver in it.
There is no such thing as a 1942 Canadian silver dollar.
Please check your coin again and post a new question with more information. The first official Canadian fifty-cent coins were minted in 1870.
what is the value of a 1956 canadian siver dollar
About $2.00
Value of 1986 fifty cent piece
50 cents.
The value of a 1984 Canadian proof dollar is about $12.