Hello,
Some of these are actually used by Malay rulers. I had attached 2 photos of the weapon in question used to escort 2 Malay Sultan. The first is Sultan Ahmad, Sultan of Pahang, the second one is Sultan Muhammad, Sultan of Negeri Sembilan. Both pictures are taken in the end of 1800's.
I have in my possession a sword like that that is from the Malay Peninsula. It looked the same like their Sumatran counterparts, but there's a bit of intricacy of design of the hilt. The hilt is made with some white metal; probably silver aloy (since it has blackish oxidation), plated with gold. I have seen another one that is in a possesion of somebody in my hometown, a slightly larger/longer sword just like mine, that is said to be a present from Sultan Abu Bakar of Johore.
p/s: Mykeris, if you are reading this, please don't laugh.