Well, expert is a two edged sword. I think I know a lot about fur trade knives, especially scalpers, but really, I don't know ^&*about later stuff, especially the hand dags, and could crash and burn if I passed judgement on a "antique" dag.
So there are 2 factors here... expert knowledge, and a general knowledge of what fakes look like, and what real ones look like.
The second will get you a long way though. :wink: