I see, thanks for the clarification Kai and Alan. I wrongly assumed that the different styles were used as symbols for cultural/geographical identity and mixing styles would just look plain wrong in the eyes of members of that culture. Somewhat like combining sneakers with a business suit or someone in italy wearing a scottish kilt.
AND, of course, this a very specialised forum where most people care about every detail of their keris and will therefore present mostly the well dressed pieces of their collection. For sure there will be many "village style" keris around that will never end up in the collection of a keris-enthusiats or presented in an internet forum.
In the meantime i did some further "research" regarding the heritage of my oddball hilt.
What i found was this kodi from sumba which looks somewhat similar in style:
http://old.blades.free.fr/daggers/badik/kodi1a.gif
Further search about sumba revealed that the hair-knot is a common hair stlye of the women there and that there
is a also buginese minority. Didn't find any pictures of local keris, though. But as always i will propably stumble across one as soon as i stop looking ;-)
Best regards,
Thilo