You are looking at an interesting American Flyer accessory that was made prewar AND postwar, so it can go with O or S.
It was a neat concept--a passenger station, Mystic, along with a working crane on the premises for your freight needs.
This is a good buy if you are looking for one to restore or use as parts. Worth it just for the parts!
CONDITION: C-4. Shows oxidation and some surface rust; missing window inserts. Crane looks good and has crank, etc.