Philippine Cuchillo?

[Conogre]

Based upon the blade shape, style and scabbard, my first impulse is to think that it's Visayan, from the Philippines, but then you come to the hilt and pommel and my certainty evaporates.
I've seen heads and deities carved out horn, but never a woman's head, nor one that's finished off to this degree or with inserts of other materials.
Additionally, rather than being peened over, it appears to be a piece of brass or bronze somewhat reminiscent of a lamp filial.
I almost forgot....the throat treatment of the sheath on this one is actually a second seperate piece to make an actual frog as opposed to the attached leather collar normally/commonly seen with Visayan knives.
Any thoughts, facts or opinions are welcomed.
Mike