Are you sure its wood? On the older knives (pre-WWII) very very little jigged wood was used. In fact that Camillus rope knife is the only common example.
Your knife may be jigged bone. I have never seen an antique pocket knife of that quality level and style (or other jacks, stockmans, etc) with jigged wood handles. Real bone, various celluloid and hard rubber imitation bone styles, yes, but not jigged wood.
Sometimes Ebay sellers not knowing the difference will assume that a material like bone is wood.