Thank you David for your detailed answer, I read it with much interest.
Now I know a lot more about my Keris.
Actually the jewelers are closed in Germany. But I will bring my Keris to one in the future. I want to know it, too and I will share the result here, maybe it is also interesting for other members.
Concerning the collecting of Keris: Probably this won't be my last Keris and it is not my first, but I'm really no expert in this theme. And I like the possibility to ask members here. Some informations are hard to get without the right literature. And I just like to talk about ethnographic arms
Best
Robin