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).
Communication regarding the shape of a .050' radius and the need for a new plug.
| Identifier | ExFiles\Box 150\3\ scan0415 | |
| Date | 2nd April 1938 | |
| 1280 b.Steadman 2.4.38 ELO, LIVERSEDGE. .050" RADIUS SHAPE SATISFACTORY NO NEED FOR NEW PLUG STEADMAN, ROYCAR. | ||