| Reference Number | TPC/5/7/51 |
| Title | Communications Panel - Switch Panel - Ass[embl]y |
| Level | Item |
| Date | 19 August 1974 |
| Description | Evershed Power-Optics Ltd drawing number W7121 issue A (original issue). Drawn by M J Anderson. |
| Extent | 1 drawing |
| Series | Evershed Power-Optics Ltd Drawings |