Hi, Antonio! That blade is gorgeous!
I only ever had one Montagnard-style blade, but with a completely atypical the handle. I never put it on the site and now it has passed out of my hands. Andrew and Ian have some very nice ones, as you will see.
The mesh on my dha's grip actually doesn't look too hard to do. Here is a close-up of another handle that uses a similar technique:
I will post some close-ups of mine as well.
There are also various things that you can do with bone and ivory, but the grip would not be very good. I rather like the way shagreen is used on some Shan-style dha:
They usually have brass or copper nails holding the shagreen on, which are placed in a pattern and work rather well as finger-grips. JT (RhysMichael) has some very nice ones, of which this is my favorite:
This one is Ian's
