Showing a 'Curve Rib Tread' tyre pattern.
| Identifier | ExFiles\Box 158\1\ scan0188 | |
| Date | 24th June 1938 guessed | |
| 1339 CURVE RIB TREAD. | ||
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).