Photograph of a split metal clamping ring with its associated screws.
| Identifier | ExFiles\Box 94\4\ scan0116 | |
| Date | 20th May 1936 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).