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).
Comparing the prices and weights of various magnetos.
| Identifier | ExFiles\Box 4\5\ 05-page177 | |
| Date | 11th April 1921 | |
| To R.{Sir Henry Royce} from EPC. c.c. C.J. S.F. X430 EPC2/111.4.21. X.430. MAGNETOS. X4497 The present quantity price of the Watford E.6 magneto as standard on the car is £12.10.0. Weight 11.7 lbs. The price in U.S.A. is 92 dollars. We are at the moment obtaining the quantity price of the E.U.6 sleeve type Watford magneto. Weight 12.7 lbs. Quoted quantity price of R.{Sir Henry Royce} Bosch Z.R.6 is £12.0.0. Weight 18 1/2 lbs. The U.S.A. Bosch SPE quoted quantity price in U.S.A. is 35 dollars. Estimated price in England £13.0.0. Weight 15.1 lbs. Quoted quantity price for Conner is £12.0.0. Weight 16.1 lbs. EPC. | ||