This F-7 B unit locomotive was built in May 1949 for Amtrak. The EMD F-7 was a 1,500 horsepower (1,100kW) diesel-electric locomotive produced between February 1949 and December 1953 by the Electro-Motive Division of General Motors and General Motors Diesel. A total of 2,366 cab-equipped lead A units and 1,483 cabless booster B units were built.