U.P. M-4
| Order Number/Date | Railroad | Road Number | Weight | Length | Seat | Notes |
| 107- –/1911 | DL&NW | M-1 “Greeley” (M-4) | 40T | 70′ | 38 | To Great Western M-1, then UPRR M-4 (2nd) |
U.P. #4 (2nd)
Photo Courtesy of the Denver Public Library
Photographed in Sterling, Colorado, August 11th, 1929.
Photo Courtesy of the Denver Public Library
Photographed in Denver, Colorado, January 31st, 1937.
Photo Courtesy of the Denver Public Library
M-4 running near Cheyenne, Wyoming, May 15th, 1938.
Photo of M-4, date unknown.
