The C-type of New York City Subway cars was a series of elevated cars, rebuilt in the shops of the Brooklyn Rapid Transit Company between 1923 and 1925 from former BU cars. Each C-type unit contained 3 cars semi-permanently coupled to form an operating unit. Each unit consisted of a relatively modern steel-framed motor car at each end, originally built in 1903 (former 1200 series car) or 1907 (former 1400 series car) and a steam-era trailer car in the middle, originally built in 1893 (former 100 series car).
The conversion was done in order to create a fleet of elevated cars with automatic door controls capable of operating on the BMT Fulton Street Line, whose station platforms had been redone to accommodate 10-foot (3.05 m)-wide equipment instead of the standard 8-foot-9-inch (2.67 m)-wide elevated cars. The gates and platforms at the ends of each three-car unit were enclosed and a motorman's cab placed in each.
The interior gates and platforms of individual cars were removed, and passageways were created between the cars in each unit so passengers could walk from car to car without going outside. Two doorways were cut into each side of each car of the unit, and outside-hung sliding doors were attached to the cars. Despite the C-type's general appearance and the passageways between cars, they were not articulated units, since each car of the unit could stand alone on its own two trucks, while articulated units share trucks underneath the inter-car passageway.
The prototypes of the C-type units, created in 1923, presented a fairly neat appearance, but the production cars created in 1925, with their varying roof heights, floor extensions to reach the platforms, and roof extensions to contain the hangers for the sliding doors presented such an ungainly appearance that they have been popularly characterized as the ugliest equipment ever to run on the New York City subway system. Despite criticism, many of the C-types remained in passenger service until 1956, when the last original portions of the Fulton Street elevated were abandoned and later demolished. No examples of this car survive.