| Reference Number | TPC/5/12/4 |
| Title | Auxiliary Pin Matrix Upper Theatre National Theatre |
| Level | Item |
| Date | 22 August 1974 |
| Description | Rank Strand Electric Ltd drawing number 1A14303 issue B. Drawn by W Fielding. Original date 29 July 1974. |
| Extent | 1 drawing |
| Series | Rank Strand Electric Ltd Drawings |