| Reference Number | TPC/5/6/138 |
| Title | Disc to Stage Locks Hydraulic Schematic |
| Level | Item |
| Date | 05 September 1974 |
| Description | Mole-Richardson (Stage & Studio Engineering) Ltd drawing number D14/297. Drawn by S W. Works number 2815/140. |
| Extent | 1 drawing |
| Series | Mole-Richardson (Stage & Studio Engineering) Ltd Drawings |