From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Pencil sketch of the instrument board for a 40/50 model.
| Identifier | ExFiles\Box 60\3\ Scan238 | |
| Date | 27th July 1933 guessed | |
| STARTER CLOCK SPEEDO STARTER CARB. 40/50 INSTRUMENT BOARD H SET S SET OFF M B OFF | ||