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.

Features Include:
• NEW! Separately-applied wire grab irons
• NEW! Coupler cut bars, trainline hoses and lift rings
• NEW! Improved painting and printing
• NEW! Improved detail on radiator section
• NEW! Revised roof detail on long hood
• Realistic die-cast mainframe
• Five-pole skewed armature motor with dual flywheels for optimum performance at all speeds
• Directional lighting
• Factory- equipped with AccuMateฎ knuckle couplers
• Friction-bearing or rolling-bearing trucks where appropriate