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).
Confirmation from North & Sons Ltd. to increase the safety gap length in Watford Aero Magnetos Type I.S.12.
| Identifier | ExFiles\Box 43\4\ Scan041 | |
| Date | 29th December 1926 | |
| X.4021 - Watford Aero Magnetos Type I.S.12. In reply to EFC5/T10.12.26, North & Sons Ltd. have written us confirming the verbal undertaking which Mr.North and Mr.Allen gave to you on the 17th inst. that they are arranging to increase the length of the safety gap in these magnetos. | ||