[Ian]

Kino,

As a guess I think it could be from Zamboanga and Chavacano in origin. I had a Chavacano bolo in a similar scabbard, but it also had a drilled belt hanger (which yours does not have). The carving at the throat is vaguely Sulu but not quite right, as noted on other pieces from Zamboanga. Perhaps Yakan???

That looks a fearsome blade. Is it chisel-ground?

Ian.