Colorado Railroad Museum
Denver and Rio Grande Western
Restored at the museum
Builder's No. 20527 (F9A) and 20531 (F9B) used in multiple with other A and B units in mainline freight service between
Denver and Salt Lake City and also used on the California Zephyr in the 1960s and the Rio Grande Zephyr in the 1970s and early 1980s.
Last revenue trip in freight service September 30, 1984; donated by the Southern Pacific Lines 9/11/96. (From the museum web site)