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).
Table detailing the specifications of steering levers found on various cars during examination.
| Identifier | ExFiles\Box 153\4\ scan0162 | |
| Date | 20th August 1943 | |
| Ev.{Ivan Evernden - coachwork}1/JH.20.8.43. Appendix Sheet.1. STEERING LEVERS. AS FOUND ON CARS WHEN EXAMINED. CARS. | Lever fitted when examined | Length in inches. | Serration Setting. | Angle between bosses. | Offset in inches. | Lubrication plug. | Boss on shaft and serrations. | Front Fan. ---|---|---|---|---|---|---|---|--- 12.B.V. | FB.4200 | 4.825. | +1°-42' | 10° - 11' | 1.500 | Olive. | Std. boss. 1.125 dia. | Straight 10.B.V. | FB.4155 | 5.325 | +4°-20' | 10° - 11' | 1.500 | Olive | " | Straight. 9.B.V. | FB.3687 | 5.100 | +3°-59' | 10° - 11' | 1.500 | Drip plug. | " | Straight. 8.B.V. | FB.3687 | 5.100 | +3°-59' | 10° - 11' | 1.500 | Drip Plug | " | Straight. 1.B.50. | FB.3779 | 5.100 | +1°-29' | 10° - 11' | 1.500 | Drip Plug | " | Straight. 3.B.50. | FB.4388 | 4.825 | +1°-38' | 10° - 11' | 1.500 | Olive | " | Straight. 30.G.VII | FW.1878 | 5.875 | -0°-36' | 10° - 11' | 1.500 | Olive | " | Bent. I.RT.I. | FB.4113 | 5.325 | +4°-20' | 10° - 11' | 1.500 | Drip Plug | " | Bent. | ||