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 containing two photographs showing close-up views of engine components.
| Identifier | ExFiles\Box 82\1\ scan0217 | |
| Date | 21th August 1933 guessed | |
| BTH | ||