To All: Michigan Northern RS-12 was acquired in 8/78 and was later on the dead line near the engine house in Cadillac, Michigan in the late 1970's. This unit was built in 1/53 as Seaboard Air Line #1474, later was Seaboard Coast Line #215. MN sold it to the Escanaba & Lake Superior RR in 1980 as #215 and was renumbered as #300 after rebuilding and repainting. Photo by Elvin Howland. Yours, Elvin Howland/E. St. Louis Rail Group Layout.