Hej Per,
If you have a look in Leiden's picture database you will find resembling ones with hilts like yours collected on Timor (at
www.rmv.nl)
This doesn't necessarily mean that yours has to be from Timor but that it probably is an older variation, that somehow survived longer
among the ex-pat Llanuns who were culturally isolated on Timor.
On the blade-tip it resembles a bit one of my older ones (enclosed), even if it goes the other way.
I suspect yours maybe has been reshaped based on what resembled traces after holes from brass-studs and a reshaped tip (maybe broken?)?
Congratulations to a very interesting and rare variation!
Michael