Hello F. de Luzon,
nice pieces!
I like special the second blade, very nice piece. I think that the scabbards from the first and second piece are recent but nothing wrong by this. Like Barry (Vandoo) I doubt that the inlays at the scabbard by the third kris from tortoise shell, I think they are from thin carved buffalo horn. What do you mean with "nito vine"? I would call it rattan.
And I also doubt that the pommel from the last piece is from rhino horn, most probable again buffalo horn. Can you post close ups from this pommel?
Also to you a Happy New Year!
Best regards,
Detlef