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).
List of weights for different magnetos available for testing.
| Identifier | ExFiles\Box 4\5\ 05-page090 | |
| Date | 21th October 1920 | |
| EFC. P.A.33. X.430 91230. Oct. 21st. 1920. X.430. WEIGHTS OF MAGNETOS AVAILABLE FOR TEST. X.2375. The following weights are of the complete machine without a pulley :- X. No. No. of magnetos Lbs. 2375. - Standard Watford E.6. 11.7 4181. 6 Watford E.O.6. 12.7 427. 1 German Bosch. Z.R.6. 18.25 3916. 2 American Bosch Z.R.6 15.1 3917. 2 * " B.6. 11.0 3723. 1 Berling. F.61. 15.4 * 1 * E.61. 11.7 * 1 * D.63 15.9 179. 1 Eisemann. 16.9 3724. 2 Dixie Aero. 648. 14.1 C.A.P. | ||