Apart from the unusual arrangement of the "fullers", and using Adni's reference as an ID guide, the Ron Da Nunut is also very unusual to my eye...specifically that nothing protrudes beyond the edge of the blade but it is "within".
Here is Henri's keris;
http://www.vikingsword.com/vb/showth...t=inlaid+keris
I have seen another 9 luk version of the type too.
Gavin