Here is an old Sheffield knife that I finally got around to restoring recently.
The handles are ivory and I was able to find a small piece of ivory to replace one of the handles but not enough to replace both handles.
These are the before pictures, I had already cut the pins when I remember to take some before pictures.
These are the after pictures.
The process was a bit tedious as the small, thin piece of ivory that I used to make the replacement handle with cost me about $35. So I was very cautious with the handle material; using new drills and new sanding belts to avoid overheating the ivory.
I thought the tang stamps were cool on this knife also; both sides of each blade was stamped:
