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 columns of main bearings from a Bentley 60 No.1 unit after an endurance test.
| Identifier | ExFiles\Box 123\5\ scan0329 | |
| Date | 24th February 1939 guessed | |
| BENTLEY 60; No.1 UNIT. Main Bearings after 50 hrs. Endurance Test. B.60 No.1 Unit. Main Bearings after 50 hours endurance test. | ||