| Reference Number | TPC/5/7/61 |
| Title | Proposed Mechanism for the Mimic Indicator Nat. Theatre |
| Level | Item |
| Date | 07 December 1973 |
| Description | Evershed Power-Optics Ltd drawing number X12531 issue A sheet 2 of 2. Drawn by R King. |
| Extent | 1 drawing |
| Series | Evershed Power-Optics Ltd Drawings |