Comparison photograph of a standard silent tread and a new type silent tread Dunlop tyre.
| Identifier | ExFiles\Box 45\2\ Scan350 | |
| Date | 21th August 1931 | |
| STANDARD DUNLOP 7.0" & 20" TYRES. STD SILENT TREAD AND NEW TYPE SILENT TREAD 21.8.31 | ||
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).