The old Monon blades at Romney, still in use today by CSX and Amtrak. This is train #51, the Cardinal.
Chicago Central has a motley crew of locomotives in charge of the west train pulling the hill at Dubuque.
Express train no. 51 Bangkok-Chiang Mai departure on terminal 10. Today this train is departure late 70 minute but arrive on Chiang Mai station is punctual.
Westbound Amtrak #51 passing the C&O Station
Ex-MILW same numbers: GP9's rebuilt to 2000 hp and classified as GP20
2000ex-Monongahela RR same number