NdeM #625

Ferrocarriles Nacionales de México, (better known as N de M) was Mexico's state owned railroad company from 1938 to 1998, and prior to 1938 (dating from the regime of Porfirio Díaz) a major railroad controlled by the government that linked Mexico City to the major cities of Nuevo Laredo and Ciudad Juárez on the U.S. border. The first trains to Nuevo Laredo from Mexico City began operating in 1903.

http://en.wikipedia.org/wiki/NdeM