Rubbing of a 7x18 Dunlop tyre tread pattern, noting its special outside edge.
| Identifier | ExFiles\Box 157\1\ scan0356 | |
| Date | 1st May 1936 guessed | |
| H.J. Mar P III 7x18 DUNLOP. TYRES. special outside edge. Outside A 32. EX @ 35 lbs/□" #1 F.D. | ||
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).