Peter, you must be in the "serious collector" realm. Me, just a user who has a small box full of pocket knives, a smattering of hunting knifes. All bought before I "settled" on two that I began using. The Case medium Stockman for everyday, and a Schrade Uncle Henry Golden Spike fixed blade for hunting. Both USA made...Case still is USA, but China bought the Schrade name, so the new Uncle Henry and Old Timer brands being sold are Chinese..
Anyway, as a collector, you might find this interesting...
https://www.youtube.com/watch?v=gAUEZHPhPcg&ab_channel=SMKW.com
(edit) When they mention "bone Stag" here, they're talking bone scales made to look like the old Indian Stag handle material. India quit exporting this material some time back. Never could figure out why, because this is shed antler material...no deer need be killed to get it. Maybe a poaching problem? Dunno. My 30 years old Medium Stockman sports Stag handles...I suppose that makes it a collectable. Maybe not, because it also shows 30 years of use & having been sharpened on an oilstone. Means more to me because Cindy bought it for my 50th birthday. It just feels "right" in my pocket.
(another edit) There have been youtube grumblings that the new Case knives aren't the quality of 20-30 years old ones. I can't say, because mine is 30 years old...