ex SP 4001. Chrome Crankshaft lease unit. From my collection, photographer unknown.
Chrome Crankshaft (ex SP) RS32s 4001 and 4003 eastbound. C&NW leased four of these red and black CC RS32s, 4000-4003. Only 35 Alco RS32/DL721 units were built. Fourth unit is an ex NYC RS32.