Robert, nice old sword indeed! If it can only talk about its exploits ...
I'm still figuring out the patterns of these swords -- the manner of the spiral engravings on the hilt, the blade shape, the details of the S- and D-guards, etc.
At the moment I can't find any trend, much more good leads on which part of Luzon these come from. For sure if I stumble upon something I'll let everybody know