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).
List of completed design modifications for steering, magneto, battery ignition, and instruments.
| Identifier | WestWitteringFiles\Q\2-July1927-September1927\ 90 | |
| Date | 7th September 1927 guessed | |
| contd :- -3- (12) Modified steering. (13) Sleeveless magneto. (14) Tungsten points on battery ignition. (15) Framed instruments. The designs for all these parts are completed. Hs.{Lord Ernest Hives - Chair} | ||