As a kid, I wrote to railroads and asked for pictures of their trains. A stamp on the back of this photo says: “Kaufman and Fabry Co., Commercial Photographers, Tel. HArr 7-3135, 425 So. Wab. Ave., Chicago.” Penciled in on a blank marked “No.” is “48-1347.” I surmise it was taken in 1948. That it is the Broadway Limited is merely an educated guess.