I still think that both Michael's and RobT's swords are utak janaps which are Moro tools/weapons. A bangkung would have a straighter spine much like a lumad kampilan or a binangon. The janap has also a more squared off tip. Basically, it's more of a utilitarian bolo, but as seen with other bolos across the Philippines they can be used as weapons. The two examples posted here are fancier than more typical janaps meaning these were intended to be used as weapons. The scabbards look like mid 20th C. sulu design and the hilts also have the hybrid kakatua/horsehoof or nay kuray pommel (I believe that's the term...my reference book on this is being borrowed by the guy that won the ivory pommel barung the other day.) If I had to take a guess, I suspect these are from Sulu or Basilan. Hope this helps

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