Atlas' high quality N Scale locomotive is modeled after Electro Motive Division's 2000 horsepower GP-38 diesel introduced in the late 1960s and built through the early 1970s and is still in service today throughout North America. The GP-38 is usually identified by its two radiator fans located on top of the long hood and two small exhaust stacks.

The GP-40 was produced the Electro Motive Division in the late 1960s and early 1970s, the GP-40 was a 3000 horsepower locomotive best characterized by the three full size radiator fans on the rear of the roof.

The GP40-2 was the successor to the popular EMD GP-40. The GP-40-2 had mostly internal changes but several outside details varied as well. Such details include bolted down battery box covers and a roof that extends slightly beyond the rear of the cab.

Features Include:

- Directional lighting
- Walkway safety tread
- Blackened metal wheels
- Scale Speed? motor
- Factory-equipped with AccuMate? knuckle couplers
- Dynamic brakes (as appropriate by railroad)

- Golden-white LEDs

AccuMate? couplers are made under license from AccuRail, Inc.