| Reference Number | TPC/5/7/64 |
| Title | Wiring Diag[ram] National Lower Theatre System Power Assisted Bar |
| Level | File |
| Date | 03 April 1974 |
| Description | Evershed Power-Optics Ltd drawing number X12695 issue A (original issue). Drawn by C A W. Two copies, both annotated. |
| Extent | 2 drawings |
| Series | Evershed Power-Optics Ltd Drawings |