Sewar or not? If not, than wot..?

[David]

It is unusual dress, but it isn't a sewar.
Pedang is a word which literally means "sword" and we can find a fair variance in weapons that are called "pedang". It may have a more specific name, but i would accept pedang for the time being.
The dress is a form i have not quite seen before. Though possible, i am not convinced by the photos that those parts are ivory. The carving is nice regardless, though as Detlef suggests, a bit later than the blade. Some of the motifs look familiar, but i can't quite place them yet.