One last point, even the brass pin in the guard of your example is odd, I have never seen this on any kaskara or takouba, again this doesn't mean it has to be a European modification but... as we can see in your first sword, typically even if elements of the form are different the construction method follows similar rules.
When you add the shape, the construction and the look of it together... that's why I think its a later pommel at the very least.