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).
Photograph displaying a vertical shaft with a helical gear, a cylindrical mesh filter, and a connecting rod.
| Identifier | ExFiles\Box 116\1\ scan0139 | |
| Date | 1st September 1937 guessed | |
| ", | ||