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).
Note on testing the oiling of a clutch spigot on engine 60525 and a related note on engine 60544.
| Identifier | ExFiles\Box 20\1\ Scan002 | |
| Date | 2nd June 1906 | |
| Oiling clutch spiggot X872 1300 Tested No 6 engine 60525 without clutch * 2/6/06. + found that only traces of oil came from the crank shaft. from. 60544 - with valve. one groove. | ||