Unfortunately neither dates are silver. After 1967 the Canadian dollars were made of Nickel.
They are worth around 1 - 4 dollars in any condition below MS65
I'm assuming you mean a Canadian half dollar, if so then not a whole lot, silver was removed in Canadian coinage before 1969 and as such it is pretty much just worth face value which is 50 cents Canadian.
A 1969 silver Kennedy half dollar is worth $5 inn perfect condition. The value of the silver is worth $2.87.
A 1969 half dollar is 40% silver. It is a common date only worth melt. At the time of writing it is worth about $3.50 in silver scrap.
A US Kennedy half dollar dated 1969 is only 40% silver with a value of about $2.00.
There is no such thing as a 1969 silver dollar. The last true silver dollars were the Peace Dollars minted last in 1935, and then the Eisenhower Dollar was struck in copper-nickel using the same dimensions as the previous silver dollars but wasn't struck till 1971.
Check that coin again. There were no US silver dollars minted that year.
Post new question, no US one dollar coins exist.
6-15-11>>> 1969 Kennedy halves are only 40% silver and are very common, most are only valued for the silver, about $5.00
The coin is only 40% silver with a value of about $4.00
The 1969 Kennedy half dollar is only 40% silver with a value about $3.25
With a date of 1979 the coin has no silver in it. 1969 was the last 40% silver circulating US half dollar. The coin is worth 50 cents.
These coins contain 40% silver an have a worth of a little less then spot price at time of sale.