| Baldwin DS-4-4-660 | 
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|  A very rusty Baldwin DS-4-4-660 locomotive sits next to the NS main in Roanoke, VA. This is one of "The Lost Engines of Roanoke" and is Chesapeake Western #663. | 
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 | Locale | North America | 
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 The Baldwin DS-4-4-660 was a four-axle 660 horsepower (490 kW) diesel-electric switcher locomotive built by the Baldwin Locomotive Works at it Eddystone, Pennsylvania factory between 1946 and 1949. It replaced the 660 horsepower (490 kW) VO-660 in their catalog, and was in turn replaced by the 750 horsepower (560 kW) DS-4-4-750. It was the low power companion to Baldwin's DS-4-4-1000 models. 
 Original owners
  References
  - Dorin, Patrick C. (1972). Chicago and North Western Power. Burbank, California: Superior Publishing. p. 158. ISBN 0-87564-715-4.
- Kirkland, John F. (November 1994). The Diesel Builders volume 3: Baldwin Locomotive Works. Pasadena, California: Interurban Press. ISBN 0-916374-93-9.
- Pinkepank, Jerry A (1973). The Second Diesel Spotter's Guide. Kalmbach Books. pp. 282, 287. ISBN 0-89024-026-4.
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| Early units |  | 
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| Switchers |  | 
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| Road switchers |  | 
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| Transfer units |  | 
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| Cab units |  | 
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| Export units |  | 
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