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).
Extract detailing cost options for a 40/50 HP Magneto, comparing Iridio Platinum Points with Tungsten Points.
| Identifier | ExFiles\Box 65\3\ scan0420 | |
| Date | 22th January 1930 | |
| X 7791. Roy{Sir Henry Royce} 2/MG22.1.30. Extract from X.5792. 40/50 HP. Magneto, i.e. Type L.W.6. (c) The large Irridio Platinum Points, which it was provisionally suggested may be necessary will cost an extra Per Magneto ..... 5/- (d) If, however, we substitute Tungsten Points in place of the present standard Points, as discussed, there would be a reduction of, Per Magneto ..... 6/2d. Kindly confirm which are necessary. Roy.{Sir Henry Royce} | ||