This is Train 121, listed in the June 1965 edition of the Official Guide as the Domeliner "Blue Bird". By the date of this photo this train is a Norfolk and Western Railway daily train from Chicago to Saint Louis, departing Dearborn Street Station at 4:15 PM. It has only 12 stops between Chicago and Saint Louis, one of which is at the station at 47th Street, just out of the photo to the left. The consist listed in the Official Guide includes the "Blue Bird Room" Dome Parlor Lounge Car (No. P-21), (Railroad Owned), Dome Chair Car (reclining seats), Chair Cars (reclining seats), and Dining Car - Cocktail Lounge. It appears to have a business car on the rear painted in UP colors.

This was former Wabash train number 24, by this photo date it was N&W number 4-124, the Domeliner "Blue Bird", departing Saint Louis at 9:10 AM daily for Chicago, stopping at 47th Street at 2:32 PM and arriving at Dearborn Street Station at 2:50 PM. Although leased by the N&W ( at the time of this photo, the Wabash was controlled by the PRR ), the Wabash continued to exist as a paper railroad until November 1991 when the N&W purchased the Wabash outright.