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).
Photograph showing corrosion on a Hobson's petrol gauge after 17,000 miles of use in France.
| Identifier | ExFiles\Box 91\2\ scan0335 | |
| Date | 5th October 1937 guessed | |
| 300a. 42 EX. HOBSON'S PETROL GAUGE TO LOP.F.89035. CORROSION AFTER 17,000 MILES IN FRANCE. | ||