Three Southern Pacific GP9 helpers in Black Widow paint scheme at Walong, California in March 1961. Photo from my slide collection, photographer Robert C. Madsen.
Northern Pacific Extra 7005A-West, with four F9's between Livingston and Muir a distance of 12 miles, require helpers in this area. Extra 7005A has the assistance of a pair of GP9s 272 and 300 on... (more)