London Underground 1973 Stock
| 1973 Stock | |
|---|---|
 A 1973 Stock train at Hillingdon | |
| Stock type | Deep-level tube |
| Line served | Piccadilly line (1973 – present) |
| Manufacturer | Metro-Cammell |
| Operator | London Underground |
| Specifications | |
| Train length | 106.810 m (350 ft 5 in) |
| Car length | DM 17.473 m (57 ft 3.9 in) T/UNDM 17.676 m (57 ft 11.9 in) |
| Width | 2.629 m (8 ft 7.5 in) |
| Height | 2.888 m (9 ft 5.7 in) |
The 1973 Tube Stock is the electric multiple unit (train) used on the Piccadilly line of the London Underground. It was introduced into service 1975 with the extension of the line to Hatton Cross. Another extension was constructed to Heathrow Central in 1977. A total of 86 six-car trains were made. The trains were built by Metro-Cammell.