Builder's photo of McCloud River Railroad Baldwin 2-6-2 steam locomotive number 8 (construction number 18595, built in 1901) at Philadelphia, Pennsylvania. Photo by Baldwin Locomotive Works, J.M. Fredrickson Collection. Other Subject Classes: steam locomotive, builder's photo.

Builder's photo of McCloud River Railroad Baldwin 2-6-2 steam locomotive number 8 (construction number 18595, built in 1901) at Philadelphia, Pennsylvania. Photo by Baldwin Locomotive Works, J.M. Fredrickson Collection. Other Subject Classes: steam locomotive, builder's photo.

Northern Pacific diesel locomotive number 175 at Eddystone, Pennsylvania. NP 175 is an AS 415 built by Baldwin in 1948. The NP renumbered this unit to 500 in 1950. A replacement Electro Motive Division of General Motors Company engine was installed in this unit in 1959. Photo by Baldwin Locomotive Works, J.M. Fredrickson collection. Other Subject Classes: diesel locomotive, switcher locomotive

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 3010 is posed for a builder's phato at Philadelphia, Pennsylvania, in August 1907. Number 3010 is a class Z built by Baldwin in 1907 J.M. Fredrickson collection. Other Subject Classes: steam locomotive, roster photo

Northern Pacific steam locomotive 4 at Erie, Pennsylvania in 1907. Number 4 is a class V-2 built by Heisler in 1907. Photo by Heisler, J.M. Fredrickson collection. Other Subject Classes: steam locomotive in roster photo

Northern Pacific steam locomotive 4 at Erie, Pennsylvania in 1907. Number 4 is a class V-2 built by Heisler in 1907. Photo by Heisler, J.M. Fredrickson collection. Other Subject Classes: steam locomotive in roster photo

Northern Pacific steam locomotive 603 at Philadelphia, Pennsylvania, in 1909. This is a builder's photo of Number 603 which was a class N-1 built by Baldwin in 1909. J.M. Fredrickson collection. Other Subject Classes: steam locomotive, roster photo

Pennsylvania Railroad diesel locomotive 6893 at Pittsburg, Pennsylvania on July 13, 1964. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive

Pennsylvania Railroad Interlocking control tower at Pittsburg, Pennsylvania, on July 13, 1964. Photo by J.M. Fredrickson. Other Subject Classes: control tower