Prototype: Three-unit locomotive consisting of an A unit, a B unit, and an A unit. General Motors EMD type F7 painted and lettered for the American railroad Denver & Rio Grande Western.

Model: Both A units have a 5-pole motor powering both trucks. The B unit is not powered. The number boards are lighted. The front and rear Z Gauge coupler on the A units can be replaced by a pilot included with the model. All 3 locomotive units are permanently coupled together with drawbars. Total length 227 mm / 8-15/16".