Kai, what is really nice about this puppy is that you have the silver inlay intact.
A rare thing indeed. Regarding restoration, you may want to consider wrapping the hilt below the pommel in silver okir bands. I would take a little time to polish the silver inlay. If you want, you can email me on other matters of restoration, or if you want me to do any of it. Would take too long to exlain everything on this posting and not sure if this is the proper place to do it. You are right in that this is a datu piece.