Thanks Charles and Ian,
Sorry if I overloaded this thread with reference pictures. I just felt that one example wasn't significant enough.
Actually I am not convinced yet myself that those hilts didn't once originate in Mindanao.
Several resembling Kampilans are found in Spanish museums, as well as in Leiden, that has been collected in Mindanao.
Regarding the Spanish museums that's my assumption that they were collected in Mindanao because the rest of the weapons exhibited are from the Philippines and the Spanish never colonised North Borneo.
In Leiden the catalogues have been published so it's easy to trace where the the different Kampilans were collected.
Michael