| Reference Number | TPC/5/2/134 |
| Title | National Theatre Ring Intercom |
| Level | Item |
| Date | 07 August 1973 |
| Description | Theatre Projects Consultants Ltd drawing number 904/349 issue 1. Drawn by S G/R G B. Original date 11 July 1972. |
| Extent | 1 drawing |
| Series | Theatre Projects Consultants Ltd Drawings |