Great Northern Steam Locomotive Number 2550, Class S-1, with passenger train rounding curve, undated.

Great Northern steam locomotive 2550 at Superior, Wisconsin on June 19, 1960. Class S-1. Norm Priebe Collection. Photograph by Vierkant. Black & white negative, 2 7/8 inch x 4 3/4 inch. Other Subject classes: Steam locomotive

Great Northern Steam Locomotive Number 2550 with passenger train departing Saint Paul Union Depot, Class S-1, at Saint Paul, Minnesota, undated.

Great Northern Steam Locomotive 2550, Class S1 in Hillyard, Washington, undated. Photograph by Wade Stevenson.

Great Northern Steam Locomotive 2550, a Class S-1, a 2-8-2, built by Baldwin Locomotive Works in 1929, 28"x30" cylinders, 73" drivers, 250 psi steam pressure, 4720,100 pounds weight, 68,500 pounds tractive effort. This class did not work out as passenger engines so they were used on freight from Spokane, Washington to Whitefish, Montana. Taken at Hillyard, Washington by David Emerson in 1935.

Great Northern Steam Locomotive Number 2550 at Hillyard, Washington, 1935.

Great Northern Steam Locomotive Number 2527, Class P-2, undated.

Great Northern steam locomotive 2527. Note the "Wm Crooks", (4-4-0, and the first locomotive in Minnesota), in the background.

Great Northern steam locomotive 2527 at Minot, North Dakota on January 22,1942.

Great Northern Steam Locomotive Number 2526, Class P-2, undated.