Kai, I'm not sure I would call this Sulu. The "mouth" does not suggest this to me. I thought it to be Maguindanano, though a form that can look Tausug.
As for baka-baka vs asang-asang - you got me.
I used the term as a short cut or short hand for all the clamps. Guess I need to stop cheating on the terms.
The hilt design - that was from the indentations on the wood. I have seen this on turn of the century pieces before, though I admit uncommon.