Northern Pacific steam locomotive 2657 at Laurel, Montana, on September 04, 1953. Number 2657 is a class A-2 built by Baldwin in 1935. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive in roster photo

Northern Pacific steam locomotive 2660 at Laurel, Montana, in 1939. Number 2660 is a class A-3 built by Baldwin in 1938. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive in roster photo

Northern Pacific steam locomotive 2661 at Laurel, Montana, on September 04, 1953. Number 2661 is a class A-3 built by Baldwin in 1938. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive in roster photo

Northern Pacific steam locomotive 5106 at Laurel, Montana, on September 04, 1953. Number 5106 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 5106 at Laurel, Montana, on September 04, 1953. Number 5106 is a class Z-6 built by Alco-Schenectady in 1936. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, roster photo

A view of the firebox of Northern Pacific steam locomotive 5107 at Laurel in Montana, circa 1949. 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 Laurel, Montana, on September 04, 1953. 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 5109 at Laurel, Montana, on May 21, 1954. Number 5109 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 5125 park in the yard at Laurel, Montana, circa 1953. Number 5125 is a class Z-7 built by Alco-Schenectady in 1941. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive in roster photo

Northern Pacific steam locomotive 5136 at Laurel, Montana, on September 04, 1953. Number 5136 is a class Z-8 built by Alco-Schenectady in 1943. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive in roster photo