Congratulations, Flavio.
That's really an interesting and (in my opinion) beautiful sword.
As noted before, the woven rattan basketry covering the scabbard is unusual. The closest thing I have seen is "Montagnard" work. Some scabbards attributed to Northern Thailand and Laos are completely wrapped by rattan strips. This example is missing some rattan:
Additionally, I have seen swords/machetes attributed to the Vietnam highlands with scabbards completely constructed of rattan strips woven into a true cylindrical basket. Can't locate my photos of these at the moment.
The Blade design is quite pleasing with that wide central fuller and decorative work. The handle, with its swollen central bone section is nicely done as well.
At one time, I would have been quick to catagorize this as Burmese (Kachin). I think this might be Northern Thai, based on some things PUFF has shared with us recently.
PUFF? What do you say?