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).
Cross-sectional diagram of the Phantom III clutch mechanism.
| Identifier | ExFiles\Box 93\3\ scan0397 | |
| Date | 21th October 1937 | |
| A B C P III CLUTCH SEE RM{William Robotham - Chief Engineer}|NRC{N. R. Chandler}|JH21-10-37 NOT TO SCALE. | ||