Photograph of a machined or cast metal component with multiple bores.
| Identifier | ExFiles\Box 158\4\ scan0020 | |
| Date | 27th January 1934 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).