Quote; 'These silver rings look a bit questionable to me as gunong parts though. Not sure they originally come from this blade'
Indeed they seem more Indian-like, with those stuck on wire in a strange deco. -I could be wrong here- but much comparisson will learn. Apart from the top engraved ring, which does look more like the filipino way.
But its all quite suitable anyway, I would say; make it a nice knife again.
A billiardball!?? How are you gonna try to saw it in pieces to fit it as endpiece? Why not look for a small upper (straight) hippotooth which are not too dificult to find (antique/fleamarkets/ebay?) which are already straight, hollow and just need the end to be rounded (and sides sanded).