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).
Sketch showing a modification to the profile of an existing 33 x 6.75 Dunlop Silent Tyre.
| Identifier | ExFiles\Box 45\2\ Scan181 | |
| Date | 1st November 1929 guessed | |
| SKETCH NO. DS. 3523. 6.80" 4.64" EXISTING PROFILE SHOWN DOTTED. 34.94" dia. MODIFICATION TO EXISTING 33 x 6.75 DUNLOP SILENT TYRE. | ||