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 an off-side yoke bearing with a Silentbloc component after 1750 hours of use.
| Identifier | ExFiles\Box 99\2\ scan0164 | |
| Date | 4th March 1938 guessed | |
| O.S Yoke Bearing Silentbloc after 1750 hrs. | ||