Hello Detlef, I thought that I would wait to see what the experts had to say before commenting but looks like they are being silent on this one. I am not so sure that this is from the Philippines but maybe from Mexico. The waves on the blade seem to pointed and the bird hilt is also different from anything I have seen (so far) from Luzon.
I have however seen this style of blade work as on late Philippine swords and on some daggers and swords that were made in Mexico. I have also seen this style of hilt on Mexican pieces before. Maybe Jose will comment on the designs on the throat of the scabbard for help in identifying where this was made. Sorry for not being of much help on this very interesting and unusual sword.
Best,
Robert