"junk silver" especially dollar coins and half dollars are some of my favorite silver to stack. Canadian silver primarily, but the odd time I can buy a Morgan dollar, or peace dollar I usually do for the right price!
Canadian pre 1921 quarters, 5c, dimes, and half dollars were on the British sterling standard, and therefore 92.5%. after that until 1967 dimes quarters and halves and dollars, were 80%, 1968 some became 0% silver while some were still 50%. There were still silver dollars, but not circulation after 1868. That's Canadian silver coins as best as I know.
I love Canadian silver too! I just couldn't ramble on about it off the top of my head, so I really appreciate this information. I used to run into it more when I lived up north, but here in Texas, I'm more likely to find Mexican silver, which is also cool. Thanks for stopping by!
p.s. I don't know why, but I love finding rolls of dimes.