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).
Specific L.P.S. tungsten points.
| Identifier | ExFiles\Box 35\6\ scan 419 | |
| Date | 23th April 1928 | |
| X2894 To RHC.{R. H. Coverley - Production Engineer} from EFC. EFC5/T23.4.28. TUNGSTEN POINTS We should particularly like to have the L.P.S. tungsten points referred to in our EFC4/T21.3.28. EFC. | ||