| Reference Number | TPC/3/11/1 |
| Title | Sound/Fire Door Opening & Automatic Closing Unit |
| Level | Item |
| Date | 16 December 1975 |
| Description | Mole-Richardson (Stage & Studio Engineering) Ltd drawing number D18/491. Drawn by J Reay-Young. Works number 2832 and 3230. |
| Extent | 1 drawing |
| Series | National Theatre Technical Manual for Cottesloe Sound/Fire Door |