Hi Thomas:
Nice little knife. While there is some similarity to the Visayan
plamingko (
plamenko), including the finger notch, Wayne is correct about its origin. This is a Thai work knife, but not a
bendo as I understand that term (in Malay at least) to mean a short, heavy-bladed, fat-bellied chopper usually used to split coconuts.
This thread has some pictures of the
plamingko (
plamenko) knife from the Visayas--also a work knife.
Ian