Santa Fe M-160 Mail-Express Motor Car built in 1930, had a 400hp gasoline-electric power plant, it was replaced with a diesel-electric engine in 1949. The M-160 was assigned to pull Nos. 25-26 between Clovis and Carlsbad, 183.7 miles, when it replaced a GP7. Dubbed by the locals the "Pecos Valley Chief", it continued to make its runs until late 1967. Photo by Ken Crist, from my collection.