Given iit's age, you have a very nice old Saddlehorn there! Other than to verify the dates of when that tamg stamp was used for you, I really don't know anything more about the knife than you do at this point. BUT, I do know a collector of that model who would most likely be interested if you're thinking about selling it. I think he hangs out here (AAPK) also. He goes by the handle of "Old Grinder". Super nice guy and very fair to deal with. He may also be a good source of additional info on the knife.