Help with Pacific Island (Philipines maybe) Knife

[Maurice]

I agree: A Tjikeroeh golok!

I have a very similar, only a bit larger (54 cm overall and blade is 34 cm), which doesn't fit in my collectionfield.
But I use it in my formtraining and like it very much because of the small and firm blade with little steel crosspiece as a handguard! (And I like the engravings on the sides of the blade).
Similar engravings on the spine as yours by the way...