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Baltimore & Ohio In addition to the pair of domes originally purchased for service, B&O also purchased 3 others from the Chesapeake & Ohio 7600 "Moonlight Dome" ex C&O 1850 7601 "Starlight Dome" ex C&O 1851 7602 "Sunlight Dome" ex C&O 1852 click the links above for history and photos of the cars