Any info on this kind of Sumatran knife?

[KuKulzA28]

I was browsing through old threads and found this old knife attributed to Sumatra island.
I tried to find information on it, but it doesn't seem like a typical knife of Sumatra...



Does anyone have more information on it? What ethnic/cultural groups used it? What part of Sumatra is it from? What is it called? Are there specific styles of Silat that use it? Etc.etc.

Thanks!