Northern Pacific steam locomotive 5133 waiting for its next train at Missoula, Montana, circa 1949. Number 5133 is a class Z-8 built by Alco-Schenectady in 1943. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive in roster photo

Northern Pacific steam locomotive 5133 at Missoula, Montana, on August 20, 1949. Number 5133 is a class Z-8 built by Alco-Schenectady in 1943. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive in roster photo

Northern Pacific steam locomotive 5134 with a freight train at Garrison in Montana, circa 1952. Number 5134 is a class Z-8 built by Alco-Schenectady in 1943. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive in roster photo

Northern Pacific steam locomotive 5134 waits for its next train at Garrison, Montana, circa 1952. Number 5134 is a class Z-8 built by Alco-Schenectady in 1943. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive in roster photo

Northern Pacific steam locomotive 5134 parked next to the water sport at Missoula, Montana, circa 1949. Number 5134 is a class Z-8 built by Alco-Schenectady in 1943. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive in roster photo

Northern Pacific steam locomotive 5134 at Missoula, Montana, on August 21, 1943. Number 5134 is a class Z-8 built by Alco-Schenectady in 1943. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive in roster photo

Northern Pacific 5135, a class Z-8, hauls an eastbound fruit extra between Missoula and Drummond, Montana, in August 1943. Note the parallel Milwaukee main line in the background. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, freight train, ice refrigerator car.

Northern Pacific steam locomotive 5135 at Missoula, Montana, circa 1950. Number 5135, a class Z-8 built by Alco-Schenectady in 1943, is on the turntable at the roundhouse. Photo by Blackie Moser, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, turntable, roundhouse

Northern Pacific steam locomotive 5135 at Missoula, Montana, in August 1943. Number 5135 is a class Z-8 built by Alco-Schenectady in 1943. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive in roster photo

Northern Pacific 5136 prepares to leave Cle Elum, Washington, with an extra freight east circa 1949. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, freight train.