Photograph displaying two rows of engine bearing shells for examination.
| Identifier | ExFiles\Box 5a\1\ 01-page262 | |
| Date | 25th January 1931 guessed | |
| ", | ||
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).