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 specifications for the rear axle, dashboard, exhaust, and engine components.
| Identifier | ExFiles\Box 98\4\ scan0046 | |
| Date | 31th December 1938 | |
| -2- Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls}2/JH.31.12.38. 6120. Rear axle 10/43 ratio. 7130. Dashboard - as 9.B.V. now. 5230 Exhaust - as on 9.B.V now. Engine B.5. Unit No.4 to Rm{William Robotham - Chief Engineer}/cwdl.1/MH.{M. Huckerby}31.12.38. Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls} | ||