* Prototypes in Service 1940 through 1950s

plugging into receiver and connecting Shift Linkage

and the rooftop dynamic brake fan that replaced the F3's rectangular roof vents just behind the cab

Model Number: 7868

MTH 80-2261-5 HO Demonstrator EMD SD70ACe Marklin 3-Rail w/P-S 3E+ & DCC #GM73 ProductID_12329323 * Prototypes in Service 1940This is a MTH 8022615 HO Demonstrator EMD SD70ACe Marklin 3 Rail w Proto Sound 3E+ & DCC #GM73. Features: Intricately Detailed ABS Body, Diecast Metal Chassis, Metal Handrails and Decorative Horn, Moveable Roof Fans, Metal Body Side Grilles, Detachable Snow Plow, (2) Engineer Cab Figures, Authentic Paint Scheme, Metal Wheels and Axles, NEM 340 Metal Wheels, (2) NEM 360 362 Coupler & Pocket Assemblies, (2) Hook & Chain Coupler Assemblies, #18 U. S.