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).
Photograph showing four tyres worn down to the canvas.
| Identifier | ExFiles\Box 5a\3\ 03-page065 | |
| Date | 5th November 1931 guessed | |
| SHOWING TYRES WORN DOWN TO CANVAS 25-EX. and 19-G4. | ||