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).
Handing over two Watford EW.6 magnetos for a noise test.
| Identifier | ExFiles\Box 65\3\ scan0178 | |
| Date | 2nd February 1928 | |
| X7791 Mx.{John H Maddocks - Chief Proving Officer} 2.2.28. We have to-day handed to Mx.{John H Maddocks - Chief Proving Officer} two Watford EW.6 magnetos Nos.100096 and 105302 for noise test. EFC. | ||