Missouri Pacific 4102 and 4103 were Electro-Motive’s only model NW4 locomotives. Built in 1938 using 900 h.p. Winton 201A engines, road trucks, and other components from experimental box-cab passenger units 511 and 512, the steam-generator-equipped diesels possessed some of the characteristics of a road-switcher.
Electro-Motive photo
