Northern Pacific steam locomotive 29 at Butte, Montana, on August 19, 1949. Number 29 was built as a class Y-1 by Schenectady in 1899. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, wood box car, freight yard

Northern Pacific steam locomotive 29 at Butte, Montana, on August 19, 1949. Number 29 was built as a class Y-1 by Schenectady in 1899. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, wood box car, freight yard

Northern Pacific steam locomotive 285 in construction service, circa 1892. Number 285 (old number series), built by Baldwin in 1883. J.M. Fredrickson collection. Other Subject Classes: steam locomotive, work train

Northern Pacific steam locomotive 280 at Philadelphia, Pennsylvania, in 1883. Number 280 (old number series), built by Baldwin in 1883, poses for its builder's photo. Photo by Baldwin Locomotive Works, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, roster photo

Northern Pacific steam locomotive 28 at Butte, Montana, on August 16, 1949. Number 28, a class Y-1 built by Schenectady in 1899, switches a passenger consist. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, passenger car, railroad crew

Northern Pacific steam locomotive 276 makes a passenger station stop at Brainerd, Minnesota, circa 1885. Number 276 is a class C-3, built by Baldwin in 1883. J.M. Fredrickson collection. Other Subject Classes: steam locomotive, roster photo

Northern Pacific steam locomotive 271, circa 1925. Number 271 is a class P built by Schenectady in 1898. Photo by Ron V. Nixon, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, roster photo

Northern Pacific steam locomotive 27 at Billings, Montana, on August 17, 1949. Number 27, a class Y-1 built by Schenectady in 1899, awaits the next assignment. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, roster photo

Northern Pacific steam locomotive 27 at Billings, Montana, on August 17, 1949. Number 27, a class Y-1 built by Schenectady in 1899, switches a cut of cars. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, freight yard, railroad crew

Northern Pacific steam locomotive 27 at Billings, Montana, on May 14, 1938. The crew of Number 27, a class Y-1 built by Schenectady in 1899, pose in the freight yard at Billings. Photo by Herman Hunt, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, freight yard, railroad crew