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).
Page displaying four numbered graphical plots or diagrams.
| Identifier | ExFiles\Box 152\1\ scan0087 | |
| Date | 11th January 1933 guessed | |
| 407 410 408 409 | ||