If the back of that skillet Wagners 1891 original and has the seasoning directions on the back, that was made in the 1990's and is not a collectible.
Those also have a reputation for warping easy so I would not use the throw it in the fire or oven cleaning cycle method.
I have 2 of those a 12" & 15". The 15" was my dads, I got it after he passed.
It has a bow to the bottom so it no longer sits flat on the stove.
