Well, i'm surprised none of the kerisopiles have come foward with a comment yet, but just so you don't think we are ignoring the "new guy"
i'll throw in my two cents. It looks like you have a fairly nice late 19thC Bali keris there with the fairly full feature ricikan which are common for this type. I would love to see you restain this blade to raise the pamor a bit better. I would think that in the Netherlands there should be a few people capable of doing this for you if you are not into doing it yourself.
I am also not too sure about the origin of your sheath. It looks like it might be Madurese work as it looks similar to the Madura Ladrang style sheath, but then for some reason i think i remember seeing a Bali keris in this form of sheath before.
It would be helpful if you posted a full length picture of the blade along with the close-ups.
