A builder's photo of Alaska Railroad steam locomotive 901 at Philadelphia, Pennsylvania in September 1976. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive

Builder's photo of Butte Anaconda & Pacific Railway steam locomotive number 20, a Baldwin 4-6-0 at Philadelphia, Pennsylvania, circa 1912. Photo by Baldwin Locomotive Works, J.M. Fredrickson Collection. Other Subject Classes: steam locomotive, builder's photo.

Builder's photo of Colorado & Wyoming Railway Baldwin 2-8-0 steam locomotive number 3 at the locomotive works in Philadelphia, Pennsylvania, circa 1900. Photo by Baldwin Locomotive Works, J.M. Fredrickson Collection. Other Subject Classes: steam locomotive, builder's photo.

Colorado and Southern Railway steam locomotive 330 builder's photo at Philadelphia, Pennsylvania in 1903. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, builder's photo

Colorado and Southern Railway steam locomotive 373 builder's photo at Philadelphia, Pennsylvania in 1922. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, builder's photo

Colorado and Southern Railway steam locomotive 649 builder's photo at Philadelphia, Pennsylvania in 1906. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, builder's photo

Builder's photo of Columbia River Belt Line steam locomotive Skookum at Philadelphia, Pennsylvania, in 1910. Articulated locomotive Skookum at Baldwin factory after conversion to oil and sale to the Columbia River Belt Line. Photo by Baldwin Locomotive Works, J.M. Fredrickson Collection. Other Subject Classes: steam locomotive.

Builder's photo of Death Valley Railroad number 1 steam locomotive, a narrow-gauge Baldwin 2-8-0 (construction number 41473) at Philadelphia, Pennsylvania, circa 1925. Photo by Baldwin Locomotive Works, J.M. Fredrickson Collection. Other Subject Classes: steam locomotive, builder's photo.

Fort Worth and Denver Railway steam locomotive 405 builder's photo at Philadelphia, Pennsylvania, circa 1906. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, builder's photo

Great Northern Railway electric locomotive number 5004A-B, undated. Baldwin-Westinghouse Builder's photo of Great Northern Railway 5004A & B box cabs. Photo by American Locomotive Company, J.M. Fredrickson collection. Other Subject Classes: electric locomotive.