Northern Pacific steam locomotive 5107 at Drummond, Montana, in 1939. Number 5107 is a class Z-6 built by Alco-Schenectady in 1936. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, roster photo

Northern Pacific steam locomotive 5107 at Drummond, Montana, in 1940. Number 5107 is a class Z-6 built by Alco-Schenectady in 1936. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, 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.