Join Date: Dec 2004
Location: Louisville, KY
I like it! It is indeed early and I would suspect that the blade will be laminated with an etch.
Usually these come from Mindanao. Hard to tell if Maranao or Maguindanao, though what I can see of the okir points in this direction. As far as date is concerned, I think you are right, maybe 1900-1910.
On the chased versus filigree/granulation question, there is no certain time that these were used since everyone had access to the techniques, although the Maranao did more of this than anyone. In addition chasing goes back millenia in many cultures around the world, including the Philippines.