These were commonly know as the "Colonial " model usually plain guns with no or borderline engraving . I have also seen a "Coladian " for the Canadian market .
An interesting thread.
I wonder about the origin of the name. It would appear to be based on that form of pigdin English beloved of marketing types combining Colonial and Indian to Colindian.... sort of like the Ovunda. I understand that Colindian is a sort of slur for indians in South Africa but I doubt that's the origin.
So perhaps you're correct and the Canadian variant really should be the Coladian?
Jeremy