Hello Xas,
I haven't come across any additional antique examples.
To put things into perspective for the other forumites, here some examples that appeared in earlier threads:
http://www.vikingsword.com/vb/showthread.php?t=24672
http://www.vikingsword.com/vb/showthread.php?t=24694
It would be really nice, if we were able to narrow down their origin(s) within southern Luzon (possibly including Batangas, too?).
Regards,
Kai