Its a 1963 set that was sold by retailer B. Altman.
#238=25 steam loco w/smoke and 234W tender, 6414-150 auto loader, 6406-30 automobiles, 6465 tank car, 6476 hopper, 6162 gondola, 6257 caboose.
could have come with green or brown autos- rarest
also with yellow autos.
Its a rare set according to John Schmid's guide to Lionel's promotional outfits