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).
Electrical experimental record sheet for a Watford aero magneto, type IS12, No. 83119.
| Identifier | ExFiles\Box 43\4\ Scan151 | |
| Date | 19th April 1926 | |
| X 4021 ELECTRICAL EXPERIMENTAL RECORD SHEETS X.&No:- 4021 Watford aero magneto type IS12 NO 83119 Date on. | Location. | Date off. | REMARKS. | Miles reading start. | Miles reading finish. | Miles covered. | Total miles. --- | --- | --- | --- | --- | --- | --- | --- 22-1-27 | lab | | Received from makers fitted with new (rubber base) distributor moulding. | | | | 24-1-27 | " | 26-1-27 | Production tested. | | | | 18-3-27 | X 712 | 22-8-27 | Fitted to X 712 | | | | 22-8-27 | lab | 25-8-27 | Removed and returned to lab. Contact breaker replaced with one off 83137 | | | | 25-8-27 | Messrs Norths | | Returned to North's for modification | | | | 28-12-27 | lab | | Received back. | | | | 2-1-28 | " | | Tested preliminarily on bench. Range increased | | | | | " | | Returned upon request to Air Ministry | | | | 19.4.26. | ||