The RS-1 was introduced by ALCO in March of 1941 with the delivery of the first of two units to the Rock Island. Combining the accessibility of a switching locomotive and the higher-speed tracking of a road unit, the RS-1 started a revolution in locomotive design that was soon embraced by all of the major diesel-electric builders. Atlas' popular N scale version features the new Scale Speed motor, powered low friction drive, blackened metal wheels, dual brass flywheels, directional lighting, new white LED's, as well as AccuMate knuckle couplers. Please note: The RS-1 will not have DCC ready frames.