| Description | Date | Identifier | |
| Requesting a report on the production testing of Watford Type EW6 magnetos. | 1st Feb 1928 | Box 65 \ 3 scan0186 | |
| The production tests and failures of six Watford EW6 magnetos. | 7th Feb 1928 | Box 65 \ 3 scan0187 | |
| Instruction on production test specifications for the Phantom engine magneto. | 8th Dec 1924 | Box 65 \ 3 scan0188 | |
| Test results for nine E.W.6 magnetos, detailing safety gap, tangential force, and lowest sparking speed. | 8th Feb 1928 | Box 65 \ 3 scan0189 | |
| The noise testing of two EW.6 type magnetos, one of which was found to be unsatisfactory. | 9th Feb 1928 | Box 65 \ 3 scan0190 | |
| Return of four noisy Watford EW6 magnetos for cam modification. | 11th Feb 1928 | Box 65 \ 3 scan0191 | |
| The investigation into the noisiness of Watford EW6 magnetos and the testing of modified cams. | 11th Feb 1928 | Box 65 \ 3 scan0192 | |
| The testing of experimental magnetos, focusing on noise issues and potential causes. | 13th Dec 1927 | Box 65 \ 3 scan0193 | |
| The noise testing of various magneto models and their contact breaker levers. | 11th Feb 1928 | Box 65 \ 3 scan0194 | |
| Solutions for machine noise and excessive tangential operating force on levers, with references to specific parts and manufacturers. | 11th Feb 1928 | Box 65 \ 3 scan0195 | |
| Technical memorandum discussing issues with the angular location and electrical performance of six magnetos. | 1st Feb 1928 | Box 65 \ 3 scan0196 | |
| The performance, durability, and testing of Lucas magnetos, comparing different contact point materials. | 24th Jan 1928 | Box 65 \ 3 scan0197 | |
| Timing test results for a Watford EW6 Magneto No.100082. | 14th Feb 1928 | Box 65 \ 3 scan0198 | |
| Requesting a Watford EW6 magneto from production for a 10,000-mile test. | 24th Feb 1928 | Box 65 \ 3 scan0199 | |
| The satisfactory testing of a sample magneto, No. 106012, on a stationary rig and three different chassis. | 28th Feb 1928 | Box 65 \ 3 scan0200 | |
| Magneto No.106012 which has developed a bad knock. | 28th Feb 1928 | Box 65 \ 3 scan0201 | |
| Report on a special duralumin contact breaker lever for a Watford Magneto. | 28th Feb 1928 | Box 65 \ 3 scan0202 | |
| Instructions regarding a test on special contact breaker levers for Watford chassis magnetos. | 28th Feb 1928 | Box 65 \ 3 scan0203 | |
| Test report on a magneto, detailing a durability run and subsequent inspection for wear on the rubbing block and contact points. | 8th Dec 1924 | Box 65 \ 3 scan0204 | |
| Use of EW.6 magnetos alongside the E.O.6 type to avoid costly scrap. | 2nd Mar 1928 | Box 65 \ 3 scan0205 | |
| Suggestion to replace a noisy Watford magneto on car 8-EX with a Lucas magneto from car 16-EX. | 6th Mar 1928 | Box 65 \ 3 scan0206 | |
| Internal memorandum regarding the performance and modification of Watford EW6 magnetos. | 7th Mar 1928 | Box 65 \ 3 scan0207 | |
| Graph comparing the Volt-Speed and Ampere-Speed curves for the primary windings of various magnetos. | 26th Oct 1921 | Box 65 \ 3 scan0208 | |
| Graph showing Open Circuit Volt-Speed and Short Circuit Ampere-Speed curves for the primary windings of Watford EW6 Magnetos. | 19th Jan 1928 | Box 65 \ 3 scan0209 | |
| Covering memo for an attached report regarding Watford EW6 magnetos. | 7th Mar 1928 | Box 65 \ 3 scan0210 | |
| Recommendation to prevent a short circuit on Watford EW6 Magneto contact breaker covers by filling a riveting hollow with insulating compound. | 7th Mar 1928 | Box 65 \ 3 scan0211 | |
| The testing of a special Watford EW6 magneto, noting its design differences and a 'knock' developed during trials. | 8th Mar 1928 | Box 65 \ 3 scan0212 | |
| Magneto testing, modifications for noise reduction, and fitting to experimental cars. | 8th Mar 1928 | Box 65 \ 3 scan0213 | |
| Continued page discussing the angular location of a distributor rotor for EW6 machines. | 7th Mar 1928 | Box 65 \ 3 scan0214 | |
| Test report on a Watford EW6 Magneto, focusing on diagnosing and resolving a noise issue. | 7th Mar 1928 | Box 65 \ 3 scan0215 | |
| Internal instruction memo raising questions about the design and modification of Watford EW6 magnetos. | 13th Mar 1928 | Box 65 \ 3 scan0216 | |
| Series of queries and statements regarding magneto issues, specifically contact breaker point wear and the potential use of tungsten. | 8th Dec 1924 | Box 65 \ 3 scan0217 | |
| Instruction regarding the specifications and performance of magnetos with tungsten points. | 8th Dec 1924 | Box 65 \ 3 scan0218 | |
| Production inspection and test log for Watford Type EW6 magnetos. | 12th Mar 1928 | Box 65 \ 3 scan0219 | |
| Unfavourable test results for three out of four Watford Magnetos on a 40/50HP chassis. | 14th Mar 1928 | Box 65 \ 3 scan0220 | |
| Letter to Messrs. North & Sons Ltd. discussing various technical points regarding magnetos, including cam rings and contact point wear. | 14th Mar 1928 | Box 65 \ 3 scan0221 | |
| Magneto testing, detailing issues with contact wear, noise, and a comparison of gear materials. | 23th May 1928 | Box 65 \ 3 scan0222 | |
| Noisy magneto in a 15-EX Phantom chassis with sports body after 9000 miles. | 7th Mar 1928 | Box 65 \ 3 scan0223 | |
| Issues and test results for several Watford Magnetos on a 40/50HP Chassis EW.6. | 21th Mar 1928 | Box 65 \ 3 scan0224 | |
| Reporting that a Watford Magneto on chassis EW.6 has developed knocks from the gears. | 21th Mar 1928 | Box 65 \ 3 scan0225 | |
| Failure of a Watford EW.6 magneto which requires investigation into the production testing process. | 23th Mar 1928 | Box 65 \ 3 scan0226 | |
| Letter from North & Sons Ltd. discussing the manufacture and supply of Watford magnetos. | 23th Mar 1928 | Box 65 \ 3 scan0227 | |
| Noisy Watford EW6 magnetos, with an attached letter from North & Sons. | 24th Mar 1928 | Box 65 \ 3 scan0228 | |
| Instruction regarding the low-speed performance issues and rejection of Watford EW6 and E06 type magnetos. | 26th Mar 1928 | Box 65 \ 3 scan0229 | |
| Test results for magneto sparking speeds at different advance and retard settings with and without a standard leak. | 8th Dec 1924 | Box 65 \ 3 scan0230 | |
| Test results for magneto low speed performance, concluding it has insufficient energy to satisfy production specifications. | 8th Dec 1924 | Box 65 \ 3 scan0231 | |
| Instruction sheet detailing revisions to the specification for a Phantom engine's magneto and low-speed figures. | 8th Dec 1924 | Box 65 \ 3 scan0232 | |
| Comparison of the volt-ampere capacities of Lucas ER6, Watford EW6, and E06 magnetos for engine cold starting. | 26th Mar 1928 | Box 65 \ 3 scan0233 | |
| Letter to Messrs. North & Sons Ltd. regarding the lubrication intervals for Watford E.W.6. Magnetos. | 26th Mar 1928 | Box 65 \ 3 scan0234 | |
| Letter to Messrs. North & Sons Ltd. regarding cold-start issues with EW.6 magnetos and requesting primary winding specifications. | 27th Mar 1928 | Box 65 \ 3 scan0235 | |
| Letter from North & Sons, Ltd. acknowledging receipt of a revised specification for an E W 6 Magneto. | 28th Mar 1928 | Box 65 \ 3 scan0236 | |
| Letter from North & Sons, Ltd. regarding the lubrication and bearing type for Watford magnetos. | 28th Mar 1928 | Box 65 \ 3 scan0237 | |
| Confirming the 500-mile oiling interval for EW.6 magneto distributor bearings. | 29th Mar 1928 | Box 65 \ 3 scan0238 | |
| The unsatisfactory cold-start performance and return of a Watford EW6 magneto. | 29th Mar 1928 | Box 65 \ 3 scan0239 | |
| Status report on the performance of experimental and production Watford EW6 magnetos. | 5th Apr 1928 | Box 65 \ 3 scan0240 | |
| Design, performance, and sourcing of Watford EW6 magnetos for the Phantom model. | 11th Apr 1928 | Box 65 \ 3 scan0241 | |
| The unsuccessful attempt to fix noisy Watford Magnetos by replacing the distributor gear. | 11th Apr 1928 | Box 65 \ 3 scan0242 | |
| The disappointing performance of Watford EW.6 magnetos, citing issues with noise and poor low-speed electrical performance. | 11th Apr 1928 | Box 65 \ 3 scan0243 | |
| Poor magneto performance, cold start failures, and subsequent endurance testing. | 11th Apr 1928 | Box 65 \ 3 scan0244 | |
| Magneto testing, discussing noise issues, modifications with cam rings, and distributor rotors. | 11th Apr 1928 | Box 65 \ 3 scan0245 | |
| Endurance testing of magneto components, specifically points and gears from different suppliers. | 11th Apr 1928 | Box 65 \ 3 scan0246 | |
| Suggestion to obtain Lucas machines for experimental production testing to prove their superiority when supplied in larger quantities. | 19th Apr 1928 | Box 65 \ 3 scan0247 | |
| Selection of magnetos, comparing Watford, Lucas, and German Bosch models for performance, reputation, and price. | 19th Apr 1928 | Box 65 \ 3 scan0248 | |
| Instructions regarding the test results for a repaired and reconditioned Watford EW6 magneto. | 16th Apr 1928 | Box 65 \ 3 scan0249 | |
| Electrical experimental record sheet for a Watford EW6 magneto, number 99802. | 26th Apr 1928 | Box 65 \ 3 scan0250 | |
| Confirming the return of converted Watford EW6 magnetos from Messrs. North. | 19th Apr 1928 | Box 65 \ 3 scan0251 | |
| Exacting requirements for magnetos, comparing Watford and Robert Bosch products. | 21th Apr 1928 | Box 65 \ 3 scan0252 | |
| Electrical principles, component selection from suppliers like Watford and Messrs. North, and related reports. | 16th Apr 1928 | Box 65 \ 3 scan0253 | |
| Consideration of various magneto makes for the Phantom model. | 23th Apr 1928 | Box 65 \ 3 scan0254 | |
| Report comparing the performance of magnetos from Scintilla, Simms, and Lucas. | 21th Apr 1928 | Box 65 \ 3 scan0255 | |
| Summary of magneto rejections on production chassis from January to April 1928. | 21th Apr 1928 | Box 65 \ 3 scan0256 | |
| Return of three EW6 Watford Magnetos to North & Sons Limited for rectification. | 23th Apr 1928 | Box 65 \ 3 scan0257 | |
| Letter from North & Sons Ltd. reporting on the testing of three EW6 Watford Magnetos. | 19th Apr 1928 | Box 65 \ 3 scan0258 | |
| Testing and specification compliance of EW6 Watford magnetos. | 24th Apr 1928 | Box 65 \ 3 scan0259 | |
| Electrical experimental record sheet for a Watford type EW6 magneto No 99171. | 19th Apr 1926 | Box 65 \ 3 scan0260 | |
| Testing of Watford EW6 magnetos fitted with continuous cam rings. | 24th Apr 1928 | Box 65 \ 3 scan0261 | |
| Fitting a new Watford EW6 magneto with a continuous cam ring to reduce noise. | 25th Apr 1928 | Box 65 \ 3 scan0262 | |
| Examination and rectification of various Watford Magnetos. | 25th Apr 1928 | Box 65 \ 3 scan0263 | |
| The testing and repair status of various magnetos. | 25th Apr 1928 | Box 65 \ 3 scan0264 | |
| Cover memo for a laboratory endurance test report on a Watford EW6 Magneto, No. 105302. | 28th Apr 1928 | Box 65 \ 3 scan0265 | |
| Endurance test report for a Watford EW6 Magneto, No. 105302. | 28th Apr 1928 | Box 65 \ 3 scan0266 | |
| Suspected depreciation of magnetism in Watford magnetos after delivery and testing. | 28th Apr 1928 | Box 65 \ 3 scan0267 | |
| Depreciation of magnetism in Watford magnetos types E06 and R01. | 30th Apr 1928 | Box 65 \ 3 scan0268 | |
| Test results and modifications for EW6 Watford Magnetos with North & Sons. | 5th May 1928 | Box 65 \ 3 scan0269 | |
| Re-conditioning and dispatch of two Watford EW6 magnetos. | 7th May 1928 | Box 65 \ 3 scan0270 | |
| Investigation and testing of Watford EW6 magnetos. | 7th May 1928 | Box 65 \ 3 scan0271 | |
| Analysis of short-circuit ampere-speed curves for various chassis magnetos. | 1st May 1928 | Box 65 \ 3 scan0272 | |
| Graph of short circuit ampere-speed curves for various magnetos, with amperes expressed as a percentage of the value at 3200 RPM. | 19th Apr 1928 | Box 65 \ 3 scan0273 | |
| Testing and re-conditioning of Watford EW6 magnetos. | 11th May 1928 | Box 65 \ 3 scan0274 | |
| Requesting two EW6 type magnetos to be handed to the Experimental Department for further testing. | 11th May 1928 | Box 65 \ 3 scan0275 | |
| Results of unit and road tests for Magneto No. 100096, noting good performance but requiring slight modification. | 14th May 1928 | Box 65 \ 3 scan0276 | |
| Test results for EW6 Magneto No.100097 and a query about magnetos Nos.100096/7. | 19th May 1928 | Box 65 \ 3 scan0277 | |
| Instruction sheet detailing the test results of three Watford EW6 magnetos. | 15th May 1928 | Box 65 \ 3 scan0278 | |
| Instruction to test a new magneto and gear setup for improved electrical performance, noise, and long-term reliability. | 8th Dec 1924 | Box 65 \ 3 scan0279 | |
| Instruction sheet detailing the rejection and subsequent re-testing of a Watford EWG magneto. | 14th May 1928 | Box 65 \ 3 scan0280 | |
| Instruction sheet investigating a magneto's low-speed sparking performance. | 8th Dec 1924 | Box 65 \ 3 scan0281 | |
| Confirming the return of three tested Watford EW6 magnetos to Central Stores. | 16th May 1928 | Box 65 \ 3 scan0282 | |
| Performance and testing of Watford EW6 magnetos. | 17th May 1928 | Box 65 \ 3 scan0283 | |
| Performance and testing of EW6 Watford Magnetos with continuous cam rings. | 21th May 1928 | Box 65 \ 3 scan0284 | |
| Return of Watford Magnetos with Continuous Cam Rings, machine numbers 100096/7. | 22th May 1928 | Box 65 \ 3 scan0285 | |
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