I have done some research again. Here is one from my kris which was shown in this thread:
http://www.vikingsword.com/vb/showthread.php?t=11830
It was appointed from our experts as Maguindanao kris. When you look at yours and mine side by side you will agree that they from the "trunk" area look very similar. So I think that I was with my guess before correct.
Regards,
Detlef