Photograph of an engine crankcase, showing the main bearing journals.
| Identifier | ExFiles\Box 116\1\ scan0140 | |
| Date | 1st September 1937 guessed | |
| 190 | ||
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).