thank you for the additional pictures. I would liked to have seen close-ups from the handle material, on one of your first pictures I could come to the impression that it could be rhino horn, so I've asked for flash pictures, I've learned that you can identify rhino horn better by pictures as by pure eyes.
But the scabbard mouth show much Vietnam or Chinese influence. Would like to see the round sign at the scabbard hidden by cord.
BTW, it's a very nice knife!