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).
Note querying if extra rivets could be fitted to a metal component.
| Identifier | ExFiles\Box 180\M4\M4.1\ img003 | |
| Date | 26th January 1921 guessed | |
| metal on if extra rivets could be fitted. EP{G. Eric Platford - Chief Quality Engineer} | ||