| Reference Number | TPC/3/23/20 |
| Title | National (Upper) Theatre Layout of Wagon Drive Hauling Cables and Diverter Pulleys |
| Level | Item |
| Date | 06 November 1974 |
| Description | Hall Stage Equipment Ltd drawing number Y75/37. Drawn by B D. |
| Extent | 1 drawing |
| Series | The National Theatre Side Wagons in the Olivier and Lyttelton Theatres: Operating and Maintenance Instructions |