| Chicago Burlington & Quincy Railroad 9906A on the Denver Zephyr at Adams City, Colorado on an unknown day, photo by H. O'Hanlon, print by Gorgon C. Bassett, Chuck Zeiler collection. I roughed in the date as around late 1947 because of the trailing large numberboard E7, the last of which were delivered in 1949. However, in 1948 brake, signal and steam lines (and of course, an exposed coupler) were added to the A units 9904-9907 so they could be operated as trailing units, so I surmised that the trailing E7 was one of those delivered in 1947. |