| Reference Number | TPC/5/12/1 |
| Title | Proposed Master Panel Layout System |
| Level | Item |
| Date | 16 August 1968 |
| Description | The Strand Electric & Engineering Co drawing number W.R.127. Drawn by R J Leggatt. A note at the top left of the drawing states 'Very valuable. On loan only. Please return.' |
| Extent | 1 drawing |
| Series | Strand Electric Engineering Co Ltd Drawings |