The listing, Canada 10¢ & 25¢ silver coins (6.52 grams/.209623 ozt pure silver) has ended.
Canadian silver coins George V era 10¢ $ 25¢
The dates are illegible so I can't say for certain how old they are but all I know for sure is that since the obverse features King George V, they have to be from between 1912-1936
Unfortunately, there were coins minted in those years with slightly different designs and different silver contents. Each of these coins have to have at least 80% silver content, but they could be as high as 92.5% (sterling)
Since I can't tell you the rarity or silver content, I would just assume they are the most common date and the lowest silver content so you will not be disappointed, but they could just as easily be the rarest date and the highest possible silver content, in which case, you'd be getting a hell of a deal.
Of course there are ways for the winner to test the purity of the coins, like with acid tests, but as a numismatist, I would never do that myself.
At least 6.52 grams (.209623 ozt)of pure silver, could be more if the coins turn out to be sterling