London Underground 1973 Stock
The 1973 Tube Stock is a class of deep-level train that operates on the Piccadilly line of the London Underground. It was introduced into service in 1975 coinciding with the extension of the line to Hatton Cross in 1975, followed by Heathrow Central in 1977.
Built by Metro Cammell between 1972 and 1975, the stock was refurbished by Bombardier Transportation between 1996 and 2001
Read more about London Underground 1973 Stock: Construction, Unit Formation and Operation, Announcer System, Future Replacement
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