|Gem Offer purchase during Oct 2015.|
| The RS3m is a diesel-electric locomotive rebuilt from an ALCO RS-3 road switcher. There are many variations with various spotting features, the common features being the ALCO RS-3 frame, trucks, and usually cab and short hood. Railroads started rebuilding their RS-3 fleets early on because of the unreliability of the ALCO 244 prime movers.|
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