| Reference Number | TPC/3/6/21 |
| Title | Loading Platform and Disc to Drum Locks and Clamps - Curcuit Diagram |
| Level | Item |
| Date | c 1974 |
| Description | Mole-Richardson (Stage & Studio Engineering) Ltd drawing number D14/211 issue F. Original date 12 February 1974. |
| Extent | 1 drawing |
| Series | National Theatre Drum Drawings Part 2: 1 of 2 |