Great Northern Steam Locomotive 3368, Class O6 in Hillyard, Washington, undated. Photograph by Wade Stevenson.

Great Northern Steam Locomotive 3366, Class O6 in Hillyard, Washington, undated. Photograph by Wade Stevenson.

Great Northern Steam Locomotive 3366, Class O6 in Hillyard, Washington, undated. Photograph by Wade Stevenson.

Great Northern Steam Locomotive Number 3356 at Hillyard, Washington, 1935.

Great Northern Steam Locomotive 3356, a Class O-6, a 2-8-2, rebuilt by Great Northern in 1925-1926 from Mallet Number 1921, 28"x32" cylinders, 63" drivers, 200 psi steam pressure, 320,100 pounds weight, 67,700 pounds tractive effort, Hillyard, Washington. A David Emerson photo taken in 1934-1935.

Great Northern Steam Locomotive Number 3352 at Hillyard, Washington, 1935.

Great Northern Steam Locomotive 3352, a Class O-6, a 2-8-2, rebuilt by Great Northern Delta Shops in Everett, Washington in August 29, 1925 from W-1 Number 1919, Hillyard, Washington. A David Emerson photo taken in 1934 or 1935.

Great Northern Steam Locomotive Number 3351 at Hillyard, Washington, 1935.

Great Northern Steam Locomotive 3350, a Class O-6, a 2-8-2, rebuilt by Great Northern Shops in 1925-1926 from Number 1910 Mallet, 28"x32" cylinders, 63" drivers, 200 psi steam pressure, 320,100 pounds weight, 67,700 pounds tractive effort, Hillyard, Washington. A David Emerson photo taken in 1935.

Great Northern Steam Locomotive Number 3350 at Hillyard, Washington, 1935.