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.
Check that coin again. There were no US silver dollars minted that year.
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.
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.