I presume it was classified as Canadian because the obverse is the same as Breton 976. However, Breton was notoriously inclusive. The modern equivalent of this token is Charlton WE-5. Charlton notes: This token is an anonymous Irish piece from the county of Dublin. It is antedated (1805) and the engraver is unknown. The token was found only in small quantities in Canada. It is indeed listed by Davis as Dublin 60.
It looks like the token die was combined with a new reverse and used to strike commercial medals. The most logical places where this would have happened are London and Birmingham around or after 1823, when tokens were no longer accepted in Ireland and the token die pair had become obsolete. Things are sometimes not logical, though.
Peter