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).
The fitting scheme for B.V. and B.50 bonnets.
| Identifier | ExFiles\Box 112\1\ scan0062 | |
| Date | 16th January 1939 | |
| 840 also 440 ✓ To HPS.{Horace Percy Smith - Experimental Factory Mgr} from Rm{William Robotham - Chief Engineer}/Std. Rm{William Robotham - Chief Engineer}/Std.9/MH.{M. Huckerby}16.1.39. BONNET - B.V. AND B.50. Will you please ensure that any future B.V. or B.50 bonnets fitted up are to scheme FCD.1113 - 3.B.50 should have the scheme fitted. Rm{William Robotham - Chief Engineer}/Std. | ||