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12/21/2024
 
 
 
 
 
Owner: Union Pacific Railroad Company
Model:Alco 4-6-6-4Built As:UP 3992 (4-6-6-4)
Serial Number:70181Order No:S-1879
Frame Number:21X32 cylinders, 69" driversBuilt:6/1943
Notes:Schenectady 06/1943, retired 08/1960
Other locos with this serial:  
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