Introduced: 1975 Line Operated: Piccadilly Line Number in Service: 87
Number of Carriages: 6 Max Speed: 45mph
The 1973 stock was built between 1972 and 1975 by Metro Cammell in Birmingham, with the first train entering service on the Piccadilly Line on 19th July 1975.
The 1973 stock feature longer cars and larger door space than the previous 1938, 1959 & 1962 stock trains used on the Piccadilly Line at the time, and were designed with airport travellers and their luggage in mind.
87 6-car trains were ordered, with 79 being required at the peak of service. The 73 stock is maintained at Cockfosters and Northfields depots.
Between 1996 & 2001, the entire 73 stock fleet was sent to Bombardier Transportation for refurbishment. The interior was completely remodelled, with new seating & flooring installed, installation of grab rails, brighter lighting and creation of more luggage space at the ends of each car.