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 of a bumper lever and spring after endurance testing.
| Identifier | ExFiles\Box 95\2\ scan0036 | |
| Date | 6th June 1936 guessed | |
| BUMPER No.2. SPRING (C.83698) 37 HOURS 25 MINS. LEVER (C.83836) 39 HOURS 45 MINS. | ||