The only "J.W." I could find was J.W. Randall. That appears to be a carbon steel knife and J.W. Randall does forge knives from high carbon steel. As for the sheath, I think you have one person making the knife and another person made the sheath. Some knife makers do not make their own sheaths and buy sheaths from a leather sheath maker.
You will have to contact J.W. Randall and sent him a picture of the knife to ascertain if he is the maker. Just google J.W. Randall and you will find his web site on facebook.
RELH