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 AccuMate? knuckle couplers
Friction-bearing or rolling-bearing trucks where appropriate