This is the Atlas HO Scale RS1, SF #2395 [ATL10002997]

Atlas Master 10002997 HO ALCo RS-1, Silver DC, ATSF #2395

Features:

• Retooled die-cast metal chassis and fine scale handrails
• Golden White LEDs
• DCC/Sound version available with LokSound decoder
• Separately-applied wire grab irons, coupler cut bars, trainline hoses and lift rings
• Accurate painting and printing
• AccuMate® couplers
• Realistic die-cast mainframe
• Five-pole skewed armature motor with dual-flywheels for optimum performance at all speeds
• Directional lighting Note: Undecorated version comes with both friction bearing and roller bearing truck sideframes

Prototype Information: 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. Despite ALCO's own introduction of higher horsepower road switchers, the 1,000 h.p. RS-1 had a production span of 19 years (1941-1960) with 623 units. The  ALCO RS-1 was a 4-axle diesel-electric locomotive built by Alco-GE between 1941 and 1953 and the American Locomotive Company from 1953 to 1960. The Montreal Locomotive Works built three RS-1s in 1954. This model has the distinction of having the longest production run of any diesel locomotive for the North American market. The RS-1 was in production for 19 years from the first unit Rock Island #748 in March 1941 to the last unit National of Mexico #5663 in March 1960. The hood unit configuration of the RS-1 pioneered the road switcher type of diesel locomotive, beginning the move away from the car body units which were the standard design for road diesel locomotives before then. Most North American locomotives built since have followed this basic design. In 1940, the Rock Island Railroad approached ALCO about building a locomotive for both road and switching service. The first thirteen production locomotives were requisitioned by the US Army, the five railroads affected had to wait while replacements were manufactured. The requisitioned RS-1s were remanufactured by ALCO into six axle RSD-1s for use on the Trans Iranian Railroad to supply the Soviet Union during World War Two