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 50\1\ Scan039 | |
| Date | 11th April 1921 | |
| X4289 EFC2/111.4.21. To R.{Sir Henry Royce} from EFC. c. CJ. c. E.{Mr Elliott - Chief Engineer} _____________ X.430. MAGNETOS. X.4289 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.O.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 18¼ lbs. The U.S.A. Bosch ZR6 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. EFC. | ||