Honestly, I am with Spunjer on this one, if this kris is not the one on the photo there is a stought possibility that this belongs to datu Piang's
personal collections. The extravagance of materials used in your kris
is superlative that only a well off datu can afford or Piang himself.
In the other hand, this might had belonged to a datu influenced by
Piang or blood related.
I was right behind you on that auction, I kind'da bumped a little for you as I wanted it my self, I had the same thoughts about it. I would keep it as is if that was mine, we just do not know for fact what's behind it. Sweet catch Albovias.
I hope you don't get bored with it right away and start monkeying with it.