The blade is definitely southern Luzon (i.e., Bicol), while the hilt is Tagalog. Thus it looks like a Tagalog got hold of a Bicol blade and rehilted it (or vice versa).
The hybrid configuration is very possible, because the two regions are just next to each other (please see attached map).
[Robert, it looks like there's some engraving on the blade. Please do show us detailed pics later, please. Thanks!]
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