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).
Close-up photograph of a machined and threaded metal shaft showing markings and wear.
| Identifier | ExFiles\Box 125\1\ scan0360 | |
| Date | 14th April 1938 guessed | |
| ", | ||