B&O No. 376321 Name: B&O No. 376321 Railroad of Record: Baltimore & Ohio Railroad Type of Car: Boxcar, steel, Wagon-Top, 50 ton 41'-1 1/8" over end sills, capacity-3716 cu. Ft. Class: B&O Class M-15 PD Date Built: 1910 Date Rebuilt: 1936, 1956, and 1963 The B&O No. 376321 has been rebuilt several times to fit the needs and demands of the B&O. The No. 376321 was originally built as a 40 ton, class M-15 wooden car in 1910. In 1936-1937, the boxcar was converted into a class M-15 K wagon top. Twenty years later, the No. 376321 was taken to the shops in Washington, Indiana and was converted into a class M-15 NA with a new under frame. In 1963, the boxcar was converted into a 50 ton car, class M-15 PD. The No. 376321 is not accessible for public viewing.