Close-up photograph of two stacked tyres, focusing on the tread pattern and sidewall markings.
| Identifier | ExFiles\Box 157\1\ scan0010 | |
| Date | 4th February 1932 guessed | |
| REINFORCED 7.00 - 20 34 x 7.00 32 x 6.75 M 7.00 - 21 | ||
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).