Found this in an antique store last year and forgot about it.  As far as I can tell, this is from the early 50s, an N&W J-type out of Roanoke Shops.
On the back:
Norfolk and Western Railway’s streamline, all-coach, daylighter along New River in Virginia

Attribution, etc.:

Pub. by Roanoke Photo Finishing Co., Roanoke, Va.
K-158-D-12  44420
Dextone Made Direct from Kodachrome and Ansco Color by Dexter Press, Pearl River, N. J.