I would guess that this is of Philippine origin with strong Spanish influence and possible from Luzon. Too bad there was no scabbard or sheath with it as it would have been of great help in identifying its origin and actual age. One of the big problems with brass, bronze or copper blades is that if anyone cleans them it takes many years to develop any patina. I have one that was brought back from the Spanish American War that was cleaned (to death) by the seller because he thought it would help when he sold it.
