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).
Blueprint detailing valve lift specifications and component dimensions.
| Identifier | ExFiles\Box 173\3\ img058 | |
| Date | 28th November 1933 guessed | |
| 1.500 3.166 1.166 B VALVE LIFT (INT.) .302 VALVE LIFT (EXH.) .245 | ||