| Reference Number | TPC/3/7/8 |
| Title | Door and Gate Locks, Elevator Interlocks and Emergency Stops - Circuit Diagram |
| Level | Item |
| Date | c 1975 |
| Description | Mole-Richardson (Stage & Studio Engineering) Ltd drawing number D14-369. |
| Extent | 1 drawing |
| Series | National Theatre Drum Revolve Stage |