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.