| Reference Number | TPC/5/6/154/2 |
| Title | Two-Speed Safety Rail Circuit Diagram |
| Level | Item |
| Date | 11 October 1978 |
| Description | Mole-Richardson (Stage & Studio Engineering) Ltd drawing number D14-329 issue B. |
| Extent | 1 drawing |
| Series | Mole-Richardson (Stage & Studio Engineering) Ltd Drawings |