Model E9 was EMD’s last E-unit. This nose detail of Wisconsin & Southern E9 10C shows the engine’s dual headlight arrangement, the top headlight is an oscilating light, the bottom light is fixed. While oscillating lights are commonly known as ‘Mars light’, in this situation both headlights are Mars products. Among the classic EMD equipment on this locomotive are the grab irons and nose-door handle. Fuji Velvia 100F slide film.