Hello Treeslicer,
I've been so free to post some pictures from the ebay auction. I would call it bolo, itak or matulis. Personally I wouldn't hold on to much on a specific name. Robert, Ian or Jose will be able to tell you from where on Luzon this piece coming. I don't think that the damage of the hilt is insect bite but coming from moisture. Here you can see similar pieces from my own collection:
http://www.vikingsword.com/vb/showth...highlight=itak
http://www.vikingsword.com/vb/showth...highlight=itak