After BMT service on the joint IRT-BMT Flushing Line ended in 1949, the Q-types were refitted for operation of the IRT Third Avenue Line in Manhattan. After the latter line closed in 1955, the Q-types were refitted again to operate on the BMT Myrtle Avenue Line in 1958 to replace the last elevated gate cars in passenger service. When the lower part of the Myrtle Avenue Line closed in 1969, the Q-types were finally retired. The oldest of the cars were in revenue service for 66 years, currently the longest such service life in New York Cityrapid transit operations. Car 1612C is at the New York Transit Museum. It is never used for trips since it is a one of a kind car today, and may not be compatible with the BU cars in the museum now. The only other surviving Q-type is 1602C, which is at the Trolley Museum of New York., awaiting restoration, coupled with that museum's other subway car units.