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).
Series of six numbered diagrams showing cam profiles.
| Identifier | ExFiles\Box 152\1\ scan0086 | |
| Date | 4th January 1933 guessed | |
| 401 402 403 404 405 406 | ||