Indonesian Knife?? (Mentawaï? )

[Athanase]

Hello,

I have this knife for several years but I do not know anything about are origin.
The seller said it came from an old Austrian collection of South-East Asian items and that the knives were perhaps Indonesian but he was not sure.
I still took the risk of buying the knife because I like unusual or original objects.

At some research I found it looked like the Mentawai Palitai, but the scabbard entry and the handle are very different from the usual Palitais.

Do you have an idea?