I’m considering buying a Winchester Turn of the century large toothpick knife. The abalone series 2nd edition. 18102. The seller is just liquidating a collection and has limited knowledge. I can’t find any pattern number information on line, and I want to know if the scales are shell or celluloid made to look like shell. My impression is celluloid. I also dont know the year this knife was produced. If and one could point me in direction of a pattern number reference guide or knows the answer to my questions I would appreciate any information.