in September 2019 Three BU cars that were converted to closed
Q-type cars in 1938 for BMT service to the
1939 New York World's Fair were converted back into BU gate cars in the
Coney Island Rapid Transit Car Overhaul Shop for the transit museum in 1979. The conversion was made of wood with steel frames and dates from 1903 to 1907. However, the cars retain their 1957 lowered roofs and 1950 lightweight trucks, as well as modified marker light positions on the ends. They also remain unitized as a three car set, rather than as three self-contained cars as originally built. These cars are the oldest operational members of the
New York Transit Museum fleet. Those built in 1907 were the last BU cars ever built. They are fully operational and are occasionally used on museum-sponsored excursions; however, when the excursion goes through underground
subway tunnels, they must be towed by steel cars. For safety reasons, passengers may not ride in these cars in subway tunnels; non-employees must ride in the accompanying steel cars during the tunnel portions of the trip. The three museum BUs are currently numbered and coupled as 1407-1273-1404. They were rebuilt from Q-type unit 1622A-B-C in the late 1970s. As part of the June 22, 1965 "Transit Day" commemoration at the
World's Fair, Q-type 1622A-B-C were rehabilitated and repainted in the original colors used for the 1939–40 World's Fair, blue and orange, which are also the colors of the
New York City flag. After they were converted back into gate cars, they were given their original numbers and received the red paint scheme that they originally wore when they were brand new. ==Other surviving BUs==