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).
List of modifications and part numbers related to the front brake and front hub.
| Identifier | ExFiles\Box 98\4\ scan0053 | |
| Date | 2nd December 1938 | |
| -7- Rm{William Robotham - Chief Engineer}/Cr.{Mr Cra???ster / Mr Chichester}1/MH.{M. Huckerby}2.12.38. L.O.P. 7043 Front brake GB.3823 PD.132 wider front brakes. 7044 Front hub GB.4377 PD.291 angular contact bearings in wire wheel. Rm{William Robotham - Chief Engineer}/Cr.{Mr Cra???ster / Mr Chichester} | ||