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 production cost for Tungsten points versus Platinum points for standard battery ignition.
| Identifier | ExFiles\Box 35\6\ scan 250 | |
| Date | 3rd March 1927 | |
| Remarks on the running generally. :revirD To BY/HM.{Capt. W. Hallam - Head Repairs} from EFC. X2894 EFC3/T3.3.27. RE TUNGSTEN AND PLATINUM POINTS. V2894 / X4612 Would you kindly ascertain for us what the cost on a production basis, including fitting, would be, for - 1. Tungsten points supplied by Messrs. Reynolds. Proposed. 2. Platinum points supplied by Johnson-Matthey, Standard. for our standard battery ignition. We should be glad of this information as soon as possible. EFC. | ||