That's one good looking sword, Robert
Would that be the tang protruding on the hilt's butt end? If that would be the case, then perhaps that would mean that the sword is from Luzon, like Pampanga as what Battara mentioned. The other possibility I guess is that it is from Batangas. Both provinces are just about 100 km (60 miles) from Manila -- the former is to the north, while the latter is to the south.
At the recent
Macao exhibit, there's a similar sword [pic below] described as:
212. Luzon Tabak
Period : Post 1900, Katipunan Era
Hilt : Carved carabao horn in the shape of a human figural head with hat/cap. Hilt with octagonal brass ferrule and cap with peened tang construction.
Blade : Long clipped tipped blade. Typical blade shape used by Katipuneros.
Scabbard : Not available
Origin : Southern Luzon, Batangas
Overall Length : 65.2 cm [25.7"]
Blade Length : 50.2 cm [19.8"]
Handle Length : 15 cm [5.9"]
Scabbard Length : No Scabbard