18th century Filipino sword

[RSWORD]

Would love some feedback regarding the iconography of this sword. The handle is Carabao horn that is very nicely carved and has developed a lovely luster and sheen from many years of handling. The handle is inlaid in silver and has a silver pommel cap. The figure is unlike anything I have seen on a Filipino sword. It appears to be a royal or even religious figure but in a very old European style. There is remnants of a silver chain around the head to go along with the top piece. Perhaps a crown. At the bottom of the handle is a carved naga of very high detail. Very interesting contrast to the figure. The blade is a very thick and sturdy blade but of Filipino style and probable manufacture. I guess 18th century for this piece given the patina to the horn handle, the style of dress of the figure, and the sense that this is very early Spanish influence of a much different flavor and quality to the late 19th century carved handles with moustachioed soldier heads. Those lack the luster and patina found on this grip. So, would love input about the figure and curious if anyone has run across anything similar in a collection or museum.