| Reference Number | TPC/5/7/1/3 |
| Title | External Cabling Diagram (Provisional) for the Drum Revolve The National Theatre, London |
| Level | Item |
| Date | 16 July 1973 |
| Description | Evershed Power-Optics Ltd engineering sketch number A15630/X1 issue B. Drawn by J R G. Original date 19 June 1972. |
| Extent | 1 drawing |
| Series | Evershed Power-Optics Ltd Drawings |