Photograph of a Bentley 6C No.1 unit oil pump top driving gear after a 50-hour endurance test.
| Identifier | ExFiles\Box 123\5\ scan0331 | |
| Date | 24th February 1939 guessed | |
| BENTLEY 6C: No.1 UNIT. After 50 hrs. Endurance Test. Oil Pump Top Driving Gear (Ex.32668 in Caro-Bronze). | ||
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).