This is an unusual and perhaps not very old Maranao (?)
budiak that was included in a lot of items that just finished on an online auction. The wavy-bladed form of
budiak is certainly less common than straight-bladed forms, but there are a number of examples around such that it is a recognized variant.
This one is unusual in that it has an
okir design in its central panel, with cross-hatching for a background. I think fellow forumite, Rick, may have a similar example. I believe that this style of decoration is Maranao in origin, although Battara can probably give us a better reading.
Budiak with Okir
Maranao Kampilan with Okir
The item following this lot was a
kampilan with similar
okir work adjacent to the spine of the blade.