| Reference Number | TPC/3/17/6 |
| Title | National (Upper) Theatre Lighting Hoist Cradle Production Lighting Boxes |
| Level | Item |
| Date | 22 October 1974 |
| Description | Hall Stage Equipment Ltd drawing number Y90/16. Drawn by H M C. |
| Extent | 1 drawing |
| Series | The National Theatre Lighting Hoists and Operating Procedure for the Lighting Hoist Control System - Olivier Theatre |