I have no clue, but I'm no expert. so that's not a surprise. I will offer a couple of observations, hoping to spark a discussion. Maybe others will correct me, and I'll learn something, too?
The inwales are cut very sharply square, which seems odd to me.
The top surface of the thwart in the foreground has a rather abrupt transition to the roundover edging. It looks to me like the router or shaper wasn't set right when it was milled, or else the top surface had to get sanded a whole lot too much. Are the other thwarts like this? Could these two features (square inwales, and the thwart surface) indicate these are replacements, that weren't done particularly well? or perhaps a homemade canoe?
It may be an optical illusion, but it looks (image #2) like the gunnels flow downward just before flowing upward at the stem?
It seems lightly built, with narrow ribs, spaced fairly far apart.
The planking seems narrower than I'm used to seeing on a cedar/canvas canoe, but wider than I've seen on all-wood cedar strips.
The word "Wonga" at the stem, followed by the 4-digit number, made me wonder if it was owned by a camp or livery somewhere along the line, though that's not consistent with its stated history. So I looked up "Wonga" on Google.. lots of definitions, including a colloquial (UK and New Zealand) slang for "money," an Australian shrub, and a campground in Australia. Some of those don't make much sense, but the other definition made even less sense... a slang term for 'Internet Slang." I think we can rule that one out?
Anyway, like I said, just hoping to spur a discussion...