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 two broken components with their corresponding test mileage and duration.
| Identifier | ExFiles\Box 91\4\ scan0269 | |
| Date | 25th September 1935 guessed | |
| SPECTRECodename for Phantom III III 20,000 MILES FRANCE BUMPER 46 HOURS. SPECTRECodename for Phantom III II 4,000 MILES. | ||