JJ McLaughlin soda bottle Toronto Ontario

[CanadianBottles]

Even cracked, that other one is still a pretty good find. I think you're right that those round-ish bottomed bottles are some of the earliest crown cap bottles in Canada. I've got one from Winnipeg as well, a Blackwood's, which is quite crude. I don't think I've got any others, my other Canadian BIM crown tops have what are probably more recent, flatter bottoms.