Origin of a S.E.A. heavy knife (chopper? )

[Athanase]

Hello,

Yesterday there was a military exhibition in my city, there was very little ethnographic weapons but I found some very cheap items : Kriss pendok, old Mandingo sword (with french blade), an antique Vietnamese crossbow with quiver and arrows (from Moi people?) and this strange possibly Indonesian knife according to the seller.
I am not convinced by the Indonesian origin, but there is no doubt that it comes from Southeast Asia. The handle is covered with bronze (with a beautiful old patina), and the sheath is made of a single piece of wood (very thick) with a copper reinforcement at its opening.

The shape of the blade makes me think of some knife Filipino but also to what can be done on the side of Thailand / Laos / Cambodia...

Has anyone ever seen anything similar?