| Reference Number | TPC/5/6/81 |
| Title | [Safety Rail Drive Unit] |
| Level | File |
| Date | 19 November 1973-10 July 1978 |
| Description | Mole-Richardson (Stage & Studio Engineering) Ltd drawing number D14/169. sheet 3. |
| Extent | 2 drawings |
| Series | Mole-Richardson (Stage & Studio Engineering) Ltd Drawings |