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).
Drawing illustrating the profile and tread of a wheel and tyre.
| Identifier | ExFiles\Box 45\2\ Scan048 | |
| Date | 12th December 1927 guessed | |
| ", | ||