Northern Pacific steam locomotive 21 at Billings, Montana, on September 04, 1953. Number 21, a class Y-1 built by Schenectady in 1900, awaits its next switching assignment behind the steam lines near the roundhouse with sister number 20. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, roster photo

Northern Pacific steam locomotive 21 at Billings, Montana, on August 17, 1949. Number 21, a class Y-1 built by Schenectady in 1900, is shown with a cut of cars in the yard. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, freight yard, railroad crew

Northern Pacific steam locomotive 21 at Billings, Montana, circa 1950. Number 21, a class Y-1 built by Schenectady in 1900, awaits its next switching job at the Billings freight yard. Photo by Spear, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, freight yard

Northern Pacific steam locomotive 2095 at South Tacoma, Washington, on March 03, 1937. Number 2095, a class Q built by Alco-Schenectady in 1903, is boarded up in the deadline at South Tacoma. Photo by Herman Hunt, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, deadline

Northern Pacific steam locomotive 2095 being inspected at Guilds Lake Yard in Portland, Oregon, in 1929. Number 2095 is a class Q built by Alco-Schenectady in 1903. Photo by H.H. Arey, J.M. Fredrickson collection. Other Subject Classes: steam locomotive in roster photo

Northern Pacific steam locomotive 2093 on June 29 in 1916. Number 2093 is a class Q built by Alco-Schenectady in 1903. Photo by Charles R. Iles, J.M. Fredrickson collection. Other Subject Classes: steam locomotive in roster photo

Northern Pacific steam locomotive 2090 at South Tacoma, Washington, on April 10, 1934. The frame and drivers of Number 2090, a class Q built by Alco-Schenectady in 1903, sat in the open at the South Tacoma shops for 5 years before they were scrapped. Photo by Herman Hunt, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, scrapping yard

Northern Pacific steam locomotive 2086 at South Tacoma, Washington, on April 03, 1935. Number 2086, a class Q built by Alco-Schenectady in 1903, is ready to leave the South Tacoma shops after rebuild. Photo by Herman Hunt, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, roster photo

Northern Pacific steam locomotive 2084 at South Tacoma, Washington, on October 16, 1936. Number 2084, a class Q built by Alco-Schenectady in 1903, is parked without its side rods in the deadline at South Tacoma. Photo by Herman Hunt, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, roster photo

Northern Pacific steam locomotive 2082 at Tacoma, Washington, on July 21, 1937. Number 2082, a class Q built by Alco-Schenectady in 1903, is parked at the roundhouse. Photo by Herman Hunt, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, roster photo