Photograph of an engine bay focusing on twin carburettors with large circular air cleaners.
| Identifier | ExFiles\Box 13\3\ 03-page378 | |
| Date | 12th December 1931 guessed | |
| 3. | ||
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).