Galvano that is so helpful I can see it now, how fascinating! I cannot tell which period according to this link
http://users.skynet.be/euro-swords/klingenthal.htm
I did not know there was any French influence in Sumatra/Borneo. The big question is was the blade made in a manner that appealed to the region or were the blades finished in a standard European fashion and then altered with etching by and to suit the new owners?
I think I have some pictures of Sumatra mounted warrior I will look them out and post them.