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 modifications for ball ends and a pipe for a rear shock absorber on a 20 HP model.
| Identifier | ExFiles\Box 27\1\ Scan279 | |
| Date | 14th September 1929 guessed | |
| -2- (10) Modification to prevent ball ends from being fitted with their oil holes not opposite the brasses. (11) Modification to include loop in pipe from frame to rear shock absorber on 20 HP. Hs{Lord Ernest Hives - Chair}/Tsn. | ||