Los Angeles or Denver? By | January 9, 2023 Email Newsletter Get the newest photos, videos, stories, and more from Trains.com brands. Sign-up for email today! Get Updates Union Pacific E3A No. 5-M-1A and E3B No. 5-M-1B were bought – and lettered for – the road’s City of Los Angeles streamliner. However, on this July 1941 day they are at Denver, departing with the Pony Express. R. H. Kindig photo