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).
With a large 'X' and the repeated abbreviation 'DWG'.
| Identifier | ExFiles\Box 3\5\ 05-page014 | |
| Date | 28th September 1911 guessed | |
| DWG DWG DWG X | ||