Northern Pacific steam locomotive 57 at Tacoma, Washington, on March 09, 1935. Number 57, a class F-1 built by Baldwin in 1889, is having its "pop-valve" reset at the roundhouse after an overhaul. Photo by Herman Hunt, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, locomotive terminal

Northern Pacific steam locomotive 56 at Tacoma, Washington, on February 24, 1938. Number 56, a class F-1 built by Baldwin in 1889, is parked at the roundhouse in Tacoma. Photo by Herman Hunt, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, locomotive terminal

Northern Pacific steam locomotive 56 at Tacoma, Washington, on April 11, 1934. Number 56, a class F-1 built by Baldwin in 1889, is parked at the roundhouse in Tacoma. Photo by Herman Hunt, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, locomotive terminal

Northern Pacific steam locomotive 56 at Tacoma, Washington, on April 10, 1934. Number 56, a class F-1 built by Baldwin in 1889, is parked at the roundhouse. Photo by Herman Hunt, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, roundhouse

Northern Pacific steam locomotive 558 at St. Paul, Minnesota, circa 1939. Number 558 is a class D-2 built by Baldwin in 1888. Photo by Robert Graham, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, roster photo

Northern Pacific steam locomotive 545 starts a work train, circa 1920. Number 545 is a class D-3 built by Baldwin in 1891. J.M. Fredrickson collection. Other Subject Classes: steam locomotive, roster photo

Northern Pacific steam locomotive 545 with a freight train, circa 1915. Number 545 is a class D-3 built by Baldwin in 1891. J.M. Fredrickson collection. Other Subject Classes: steam locomotive, roster photo

Northern Pacific steam locomotive 53 at Tacoma, Washington, on October 09, 1936. Number 53, a class F-1 built by Baldwin in 1891, is parked at the roundhouse after overhaul. Photo by Herman Hunt, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, locomotive terminal

Northern Pacific steam locomotive 53 parked next to the coal dock at Tacoma, Washington, circa 1932. Number 53 is a class F-1 built by Baldwin in 1891. Photo by Herman Hunt, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, roster photo

Northern Pacific steam locomotive 53 at South Tacoma, Washington, on July 31, 1936. Number 53 is a class F-1 built by Baldwin in 1891. Photo by Herman Hunt, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, roster photo