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).
Internal request to dome the surface of six tungsten contact breaker point screws.
| Identifier | ExFiles\Box 61b\1\ scan0081 | |
| Date | 2nd May 1930 | |
| X2894. RHC.{R. H. Coverley - Production Engineer} from EFC. EFCl/ADl 2.5.30. X.2894. BATTERY IGNITION TUNGSTEN CONTACT BREAKER POINTS. Will you please have the six tungsten contact screws handed to you herewith, domed on the surface to special gauge also handed to you. ✓ EFC. HEW. Completed. | ||