Im gonna guess its probably an old demon head bolo (tenegre) from Panay (well that area Zel can probably give a very in depth history of the piece). At least Im guessing from the bad pics, that there is a round guard, and a leather throat on the scabbard. The upturn scabbard end is typical on really old Sanduko pieces, but then I seem to remember a Lumad tribe with a similar sword style, but cant quite remember the name (4 hours of sleep will do that to ya) of the group to even check up on it, so til more information comes out Im guessing Panay. I also think the monkey skull is an add on, patina looks funky compared to the rest of the sword. Also, have the suspicion that it is creeping up on the tang given the pic. Now of course, these are probably just my tired eyes playing tricks on me, but guessing is fun
