The following pieces are included (also see photos). Rolling stock (open boxcar, oil tanker, caboose). Transformer #22020 and its associated track. 2 switch tracks and their control box.
I do not know the exact year this set was made, but I do know that the company quit manufacturing them in 1966 and declared bankruptcy in 1967. All in working order, though the engine does sometimes need a little push to get going.