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 The first Alco RS-3 arrived on the GB&W in May 1951.
  
The builder's photo shows the "as-delivered" appearance of the
locomotive; over the years several changes took place, most notably:
 
  - The exhaust stack was reconfigured when the locomotive was switched to a
    water cooled turbocharger (ca. 1955).
 
  - The trucks were painted gray and white checkerboards on the frames were added (ca.
    1957).
 
  - The access doors with stamped louvers were replaced by doors with no
    louvers, and  two car body filters were added on each side (ca.
    1960).  The change was was a retrofit package offered by Alco to reduce
    damage to piston rings and crankshaft bearings from dust being drawn into
    the car body.
 
  - The red-and-gray paint scheme was replaced with a simpler all-red scheme
    (ca. 1969).
 
  - The RS-3s were rebuilt with a low short hood as part of a repowering
    program (ca 1973).
 
  - The gray trucks were painted black (ca. 1975).
 
 
GB&W #305 is preserved at the Gopher State
Railway Museum in New Prague,
Minn.
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