Photograph of the Ferrolcarriles Nationales de Mexico, or N de M (NDM or FNM) 1001 & 1005 diesel-electric electric locomotives crossing the "Cumbres de Maltrata". "This train (are) come down on a 6-1/2% grade for east,, 256-kilometres from Mexico City. 2 units with a power of 5400 HP. Now we handle heavy load trains of Central America to United States always working by the Victoriy "Home Electrified"