Thanks everybody,
I asked an expert in Holland. Probably it is a real old Sabre. Likely it is composite from two swords. A French Briquet (1809/1811) and an VOC chamber Hoorn kling (blade).
It was common for militia and for the garde-champêtre (=patrolman) in Dutch Indonesia to build there own (cheap) sabre.
He send me the pictures of the Briquet. Although the number of ribs on the handle don’t match (mine has 30, and the briquet 36?). The rest is identical.
Now I focus on the VOC chamber kling (perhaps a sort Pedang Soenda??).
I know there are different translations (VOC). Mine came from:
http://library.thinkquest.org/26488/en/index.html
Once more, thanks for the info.
Peter