| Reference Number | TPC/3/20/6 |
| Title | Monitor Unit Assembly National Theatre Masking Screens |
| Level | Item |
| Date | 28 August 1975 |
| Description | Tele-Stage Associates Ltd drawing number B58-15 issue 1. Drawn by R D Barnes. Original date 21 August 1975. |
| Extent | 1 drawing |
| Series | Masking Screen Hoists Operating and Maintenance Instructions |