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).
Reference note regarding a rear brake with associated codes and file location.
| Identifier | ExFiles\Box 98\3\ scan0056 | |
| Date | 10th October 1938 | |
| B.Ins. Rm.{William Robotham - Chief Engineer} 406 Da.{Bernard Day - Chassis Design}15/G.10.10.38 B.III B.50 W.80. rear brake. see file 1029. | ||