B&O Unlocked: MARC No. 7100

The AFT No. 1 toured the United States with the 1975-1976 American Freedom Train in celebration of the United States Bicentennial.

Used on the Capitol Limited and other premier B&O passenger trains in the mid-20th century, the No. 3316 “Washington” observation lounge car represented the pinnacle of luxury rail.

Produced by B&O Master of Machinery in 1875, the No. 600 was the first “Mogul” type railroad intended for passenger services, and the largest locomotive in the world at the time.

The B&O No. CE-10 once traversed the sharp turns and narrow street of Fells Point. Put into service at the dawn of the 20th century, the fully-electric locomotive was a revolution in green technology.

Built by the Wason Manufacturing Company in 1868, the B&O No. 21 resembles the daytime passenger coach used by civilians and military personnel during the Civil War.

Built by GM-EMD in 1951, the MARC No. 7100’s diesel engine was replaced with a “head-end-power plant” in 1980. Now operating as an Auxiliary Power Control Unit (APCU), the No. 7100 is used solely for powering a train’s electrical systems.

The AFT No. 1 will be unlocked again in honor of the nation’s 250th Independence Day, and to celebrate the 50th anniversary of the 1975-1976 American Freedom Train.

Built by ALCO in 1926, the C&O No. 490 was one of the last passenger locomotives to operate on the Chesapeake & Ohio Railway. Nicknamed the “Yellowbelly,” this “Hudson” type locomotive is recognized for its stylish streamlined body.

Built by the Pullman Company c.1890, the B&O No. 445 passenger coach was rebuilt in 1927 to represent a car from the B&O’s flagship Royal Blue passenger train.

Built in 1923 and retired in 1983, the B&O No. 3528 heavyweight coach was the last commercial passenger car to service former-B&O lines.

Designed to traverse the steep Allegheny Mountains and unveiled in 1863, the B&O No. 147 “Thatcher Perkins” began its career pulling military trains for the Union Army.

The CE-15 is believed to be the world’s only surviving tunnel clearance car and serves as a testament to a pivotal moment in locomotive design.

The B&O No. CE-10 worked on the small rail network of Fells Point to keep Baltimore industry moving.

The GC&E No. 1 “Shay” is an asymmetrical engine designed to navigate the uneven tracks and sharp curves of logging country.

The B&O No. X-4055, also known as the B&O No. 4723 and nicknamed “Thendara,” was originally constructed as a sleeper car and later refashioned to serve as a Maintenance-of-Way (MOW) camp car in the 1960s.

The B&O No. C-2943 is an example of an I-7A caboose, which is known for its steel body and protruding bay windows.

The B&O No. 3684 was the first locomotive to arrive to the B&O Railroad from a purchase of 16 GP-40 diesel-electric engines.

The WM No. 195 is a multi-purpose engine made to travel as fast as a mainline locomotive and was used for over two decades to pull heavy coal trains.

The B&O No. B-29 is a “Jordan Spreader,” a type of maintenance car that is considered by some to be the earliest type of railroad maintenance equipment.

The B&O No. 633 is a diesel switcher of the SW-900 model that still occasionally operates at the museum.

The B&O No. 3302 “Edward G. Hooper” Observation Lounge, serves as a reminder of luxury passenger service and traveled with the Royal Blue and the Ambassador.

A staple of railroad imagery, “bobbers” served as business offices, mobile lookout towers, and sleeping quarters.