Sword from the lesser Sunda islands (Timor?)

[Sajen]

Hello members,

this sword is already long in my possession. The seller told me that it is a Tanimbar sword but I have my doubts but it is certainly from the lesser Sunda islands up to East from Alor. I want to ask you if you are able to assign a correct origin and a estimated age of this sword. It is very big, 119 cm (46.85 inch) inside the sheat and the blade is 71 cm (27.95). The blade is mono steal so I think that the sword isn't from the 19th century. But handle and sheath have a nice patination so I don't think that it was made for those who travel.

All comments are very welcome and many thanks in advance,

Detlef