As I originally pointed out Dom, following your observation that this was a shortened blade, I think it was given this distinctive point/profile to serve as a butchering 'knife' part of the hunting trouse or even solo, rather than as a method of dispatch in it's presumably original incarnation as a sword.
Although European in origin, I get the feeling that it's 'second life' might have been 'colonial' whilst retaining it's 'hunting' useage as the modifications look more 'ethnographic' to my eye.
