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).
Table of low-speed sparking results for the Standard E06 Watford Magneto.
| Identifier | ExFiles\Box 4\5\ 05-page323 | |
| Date | 6th October 1924 | |
| -6- X.4181c. STANDARD E06 WATFORD MAGNETO. Low speed sparking results. Magneto No. | Date Taken. | Circumstances. | Advance. | Central. | Retard. ---|---|---|---|---|--- 50410 | 25.4.22. | One of the first of this type magneto tested (new) | 210 | 200 | 200 71096. | 22.5.24. | New magneto fitted with duralumin lever. | 220 | 200 | 200 71021 | 24.5.24. | New magneto fitted with duralumin lever. | 300 | 255 | 240 73957. | 24.9.24. | New magneto - Duralumin lever, bakelite gear pinion. | 280 | 230 | 210 73983. | 6.10.24. | New magneto - Duralumin lever. Bakelite pinion, Aluminium gear. | 220 | 180 | 140 73984. | 6.10.24. | New magneto - Duralumin lever. Bakelite pinion, Aluminium gear. | 210 | 182 | 178 63302. | 1.10.24. | Magneto taken off Expl. chassis. | Irregular spark-ing. | 440 | 350 70033. | 8.6.24. | Taken off chassis 5-EX. Old type lever, otherwise up-to-date. | 270 | 200 | 200 71021 | 8.6.24. | Taken off chassis 49-GB. Duralumin lever. Up-to-date magneto. | 275 | 230 | 225 Contd. | ||