| Description | Date | Identifier | |
| Test results and performance graph for a Watford Magneto Type EW6. | 16th Aug 1927 | Box 65 \ 3 scan0086 | |
| Comparative test report on the performance of Watford and Lucas magnetos at various speeds. | 27th Jul 1927 | Box 65 \ 3 scan0087 | |
| Offer from Messrs. North & Sons for a modified E.W.6 Magneto. | 7th Sep 1927 | Box 65 \ 3 scan0088 | |
| Specifications and differences of new sleeveless Watford magnetos, models 99171 and 99802. | 7th Sep 1927 | Box 65 \ 3 scan0089 | |
| Magneto performance tests, detailing sparking, circuit characteristics, and comparisons. | 7th Sep 1927 | Box 65 \ 3 scan0090 | |
| The performance, silence, and cost-effectiveness of new machines, likely magnetos, compared to standard sleeve types. | 13th Jun 1927 | Box 65 \ 3 scan0091 | |
| Letter discussing bench test results and potential modifications for sleeveless magnetos to reduce noise. | 8th Sep 1927 | Box 65 \ 3 scan0092 | |
| Letter discussing preliminary chassis tests and the subsequent decision on magnetos. | 9th Sep 1927 | Box 65 \ 3 scan0093 | |
| Test report on a Watford Sleeveless Magneto, No.99802, which developed a knocking noise but functioned well as a sparking machine. | 9th Sep 1927 | Box 65 \ 3 scan0094 | |
| Faults found during the testing of Watford sleeveless magnetos. | 9th Sep 1927 | Box 65 \ 3 scan0095 | |
| Offer from Messrs. North & Sons for a modified E.W.6 Magneto. | 7th Sep 1927 | Box 65 \ 3 scan0096 | |
| Returning a faulty magneto, No. 99802, for correction due to a knocking noise. | 10th Sep 1927 | Box 65 \ 3 scan0097 | |
| Unsatisfactory performance of new sleeveless Watford magnetos and a proposal for a cheaper, modified version. | 10th Sep 1927 | Box 65 \ 3 scan0098 | |
| Price comparison of different magneto types for the 40/50 HP chassis. | 10th Sep 1927 | Box 65 \ 3 scan0099 | |
| Letter detailing the results of preliminary tests on two type EW6 sleeveless magnetos. | 10th Sep 1927 | Box 65 \ 3 scan0100 | |
| Test report on a magneto that developed a knocking noise during a 40-mile run. | 10th Sep 1927 | Box 65 \ 3 scan0101 | |
| Test results and feedback on the EW6 Sleeveless Type of Watford Magneto. | 10th Sep 1927 | Box 65 \ 3 scan0102 | |
| Letter from North & Sons, Ltd. acknowledging receipt of two letters for the attention of Mr. E. Fowler-Clark. | 12th Sep 1927 | Box 65 \ 3 scan0103 | |
| Performance and faults of the Watford Sleeveless EW.6 magneto and the potential for a production order. | 12th Sep 1927 | Box 65 \ 3 scan0104 | |
| Comparison of Watford Sleeveless magnetos against Lucas and other brands. | 13th Sep 1927 | Box 65 \ 3 scan0105 | |
| The return of Watford magnetos from Messrs. Norths. | 6th Oct 1927 | Box 65 \ 3 scan0106 | |
| Letter from North & Sons, Ltd. proposing a visit to discuss modifications to a magneto. | 25th Oct 1927 | Box 65 \ 3 scan0107 | |
| Confirming the handover of a Watford sleeveless magneto, part number 99802. | 31th Oct 1927 | Box 65 \ 3 scan0108 | |
| Urgent request for a tester's report on an EW.6 magneto following a faulty replacement, to enable a requisition for six more units. | 11th Nov 1927 | Box 65 \ 3 scan0109 | |
| Tests and modifications for knocking noise in Watford EW6 magnetos. | 2nd Nov 1927 | Box 65 \ 3 scan0110 | |
| Performance and noise tests of a Watford Sleeveless Magneto Type EW6. | 7th Nov 1927 | Box 65 \ 3 scan0111 | |
| Continued memorandum discussing machine improvements, noise reduction, and standardisation. | 7th Nov 1927 | Box 65 \ 3 scan0112 | |
| Requesting an order be placed with North & Sons Ltd. for new sleeveless Watford magnetos for testing. | 8th Nov 1927 | Box 65 \ 3 scan0113 | |
| Letter to a supplier regarding the standardization and future supply of magnetos for the Phantom engine. | 8th Nov 1927 | Box 65 \ 3 scan0114 | |
| Requesting further information on a standardisation sheet for a new Watford Sleeveless Type EW.6 Magneto. | 11th Nov 1927 | Box 65 \ 3 scan0115 | |
| Letter from Messrs. North & Sons regarding a new magneto model and standardization efforts. | 11th Nov 1927 | Box 65 \ 3 scan0116 | |
| Letter from North & Sons Ltd. concerning the supply and production of magnetos. | 10th Nov 1927 | Box 65 \ 3 scan0117 | |
| Production and testing of the sleeveless type Watford Magneto E.W.6, highlighting ongoing issues and a 25% rejection rate. | 12th Nov 1927 | Box 65 \ 3 scan0118 | |
| The Watford Sleeveless Magneto type EW6. | 14th Nov 1927 | Box 65 \ 3 scan0119 | |
| Performance of existing Sleeveless Type EW6 Watford Magnetos and requesting a new one for a 10,000-mile test. | 21th Nov 1927 | Box 65 \ 3 scan0120 | |
| Electrical experimental record sheet for a Watford Sleeveless magneto, number 98201, type EW6. | 19th Apr 1926 | Box 65 \ 3 scan0121 | |
| The delivery arrangements for two new Sleeveless Type E.W.6 Watford Magnetos. | 22th Nov 1927 | Box 65 \ 3 scan0122 | |
| Requesting a Watford EW6 sleeveless magneto for a 10,000-mile test on a Phantom chassis. | 25th Nov 1927 | Box 65 \ 3 scan0123 | |
| Letter to Messrs. North & Sons Ltd. concerning a comparative road test of experimental magneto cams. | 30th Nov 1927 | Box 65 \ 3 scan0124 | |
| Letter discussing a magneto experiment to investigate mechanical noisiness caused by different cams. | 2nd Dec 1927 | Box 65 \ 3 scan0125 | |
| Letter from North & Sons, Ltd. regarding the production and delivery schedule for experimental cams for E.W.6. Magnetos. | 2nd Dec 1927 | Box 65 \ 3 scan0126 | |
| Letter from North & Sons, Ltd. regarding the production and delivery of experimental cams for magnetos. | 2nd Dec 1927 | Box 65 \ 3 scan0127 | |
| Letter from North & Sons Ltd regarding experiments on cam shapes and their effect on noise in contact breakers. | 8th Nov 1927 | Box 65 \ 3 scan0128 | |
| Standardisation of a chassis part, specifically the Watford Sleeveless Type EW6 Magneto. | 8th Nov 1927 | Box 65 \ 3 scan0129 | |
| Standardisation form for chassis parts detailing implementation and costs. | 12th Nov 1919 | Box 65 \ 3 scan0130 | |
| The provision of a new Watford EW6 magneto for testing on car 14-EX. | 8th Dec 1927 | Box 65 \ 3 scan0131 | |
| The production approval of the new Watford EW.6 magneto and arrangements for its use in the F.2 series. | 9th Dec 1927 | Box 65 \ 3 scan0132 | |
| Instructions for modifying lubrication for Watford EW6 magnetos. | 12th Dec 1927 | Box 65 \ 3 scan0133 | |
| The return of a faulty Watford EW6 magneto for correction. | 12th Dec 1927 | Box 65 \ 3 scan0134 | |
| Letter to North & Sons Ltd. discussing performance issues with various magnetos, including noise, armature rubbing, and cam tests. | 12th Dec 1927 | Box 65 \ 3 scan0135 | |
| Letter regarding unsatisfactory EW6 magnetos, with a later note about a noisy machine and receipt of a further magneto. | 12th Dec 1927 | Box 65 \ 3 scan0136 | |
| Lubrication instructions for Watford Type EW6 magnetos. | 12th Dec 1927 | Box 65 \ 3 scan0137 | |
| Investigation into reducing the make and break noise of a Watford EW6 Magneto using modified cams. | 13th Dec 1927 | Box 65 \ 3 scan0138 | |
| The causes of noise in contact breakers and magnetos, referencing experiments by Messrs. North. | 13th Dec 1927 | Box 65 \ 3 scan0139 | |
| Note on a slack contact breaker lever in magnetos and a planned 10,000 mile test. | 13th Dec 1927 | Box 65 \ 3 scan0140 | |
| Letter to Messrs. North & Sons Ltd. concerning tests and noise issues on an EW6 magneto. | 13th Dec 1927 | Box 65 \ 3 scan0141 | |
| Report discussing a knocking issue and the electrical performance of EW6 machines, suggesting a larger air gap. | 14th Dec 1927 | Box 65 \ 3 scan0142 | |
| Cover note attaching a report to Messrs. North & Sons regarding noise reduction on the Watford EW6 Magneto. | 14th Dec 1927 | Box 65 \ 3 scan0143 | |
| Letter from North & Sons, Ltd. regarding magneto specifications, cam angles, and clearances. | 16th Dec 1927 | Box 65 \ 3 scan0144 | |
| Sending a Watford EW6 magneto for testing on a test chassis. | 20th Dec 1927 | Box 65 \ 3 scan0145 | |
| Letter to Messrs. North & Sons Ltd. regarding the noise testing of two type EW6 magnetos. | 20th Dec 1927 | Box 65 \ 3 scan0146 | |
| Incorrectly marked magneto rotor that nearly caused a serious accident during testing. | 21th Dec 1927 | Box 65 \ 3 scan0147 | |
| Letter from North & Sons, Ltd. regarding the modification of E.W.6 Magnetos, specifically the cam design. | 22th Dec 1927 | Box 65 \ 3 scan0148 | |
| Continuation sheet of a letter from North & Sons Ltd concerning special magneto cams. | 29th Dec 1927 | Box 65 \ 3 scan0149 | |
| Letter from North & Sons Ltd. regarding the examination and testing of Magneto No. 100081. | 29th Dec 1927 | Box 65 \ 3 scan0150 | |
| Letter to North & Sons Ltd. clarifying specifications for EW6 chassis type magnetos, focusing on the period and instant of break. | 4th Jan 1927 | Box 65 \ 3 scan0151 | |
| Letter clarifying that the angle of break may vary considerably depending on the wear of the fibre heel. | 5th Jan 1928 | Box 65 \ 3 scan0152 | |
| Issues with incorrectly marked Watford EW6 magneto rotors. | 5th Jan 1928 | Box 65 \ 3 scan0153 | |
| Follow-up memo requesting the results of testing a Watford EW6 Magneto on a chassis. | 9th Jan 1928 | Box 65 \ 3 scan0154 | |
| Requesting confirmation regarding the supply of the E.W.6 Magneto and the settlement of points with Messrs. North & Sons. | 9th Jan 1928 | Box 65 \ 3 scan0155 | |
| Returned rotor arm for a Watford E.W.6 Magneto and a query about fitting a marked wheel. | 10th Jan 1928 | Box 65 \ 3 scan0156 | |
| Letter from North & Sons Ltd concerning a marking error on Magneto No.100081. | 9th Jan 1928 | Box 65 \ 3 scan0157 | |
| Letter from North & Sons Ltd. clarifying alterations to magneto distributor and rotor arms. | 11th Jan 1928 | Box 65 \ 3 scan0158 | |
| Issues with a Watford EW6 magneto, including rotor phenomena and incorrect markings. | 11th Jan 1928 | Box 65 \ 3 scan0159 | |
| Testing of a Watford EW.6 Magneto, found satisfactory apart from a noisy make and break. | 11th Jan 1928 | Box 65 \ 3 scan0160 | |
| Performance issues and proposed testing for a new type of Watford EW6 magneto. | 18th Jan 1928 | Box 65 \ 3 scan0161 | |
| Form recording the design and performance details of a magneto under test. | 18th Jan 1928 | Box 65 \ 3 scan0162 | |
| Specification sheet detailing primary point gap, contact breaker timing, and automatic advance characteristics. | 18th Jan 1928 | Box 65 \ 3 scan0163 | |
| Table of distributor dimensions with columns for relative and absolute (in inches) values. | 18th Jan 1928 | Box 65 \ 3 scan0164 | |
| Test results including Endurance, Short/Open circuit checks, and data for a volt-speed curve. | 18th Jan 1928 | Box 65 \ 3 scan0165 | |
| Test results including a closed circuit primary ampere-speed curve and sparking characteristics. | 18th Jan 1928 | Box 65 \ 3 scan0166 | |
| Test results page detailing secondary milliamps, primary point gap, and contact breaker timing. | 18th Jan 1928 | Box 65 \ 3 scan0167 | |
| Page detailing remarks on the operational silence of a magneto and a tangential force measurement. | 18th Jan 1928 | Box 65 \ 3 scan0168 | |
| Clarifying that a specific Watford EW6 Magneto was for electrical testing only and correcting a number given in error. | 18th Jan 1928 | Box 65 \ 3 scan0169 | |
| Fitting a tested Watford EW6 magneto to vehicle 15-EX for a 10,000-mile test. | 19th Jan 1928 | Box 65 \ 3 scan0170 | |
| Test results and modification suggestions for a Watford EW6 magneto which failed on leaky gap performance. | 19th Jan 1928 | Box 65 \ 3 scan0171 | |
| Instructions regarding magneto performance, timing, and primary gap variation. | 20th Jan 1928 | Box 65 \ 3 scan0172 | |
| Telegram received by telephone confirming the dispatch of six B.W.6 magnetos. | 20th Jan 1928 | Box 65 \ 3 scan0173 | |
| Letter from North & Sons Limited regarding work on an EW6 Magneto, No. 100082. | 20th Jan 1928 | Box 65 \ 3 scan0174 | |
| Communication from North & Sons Ltd about the early E.W.6 Magneto No.99171. | 23th Jan 1928 | Box 65 \ 3 scan0175 | |
| Letter from North & Sons Ltd. detailing the findings of a fault in an EW6 Magneto. | 19th Jan 1928 | Box 65 \ 3 scan0176 | |
| Letter to a supplier regarding an unexpected design change on EW.6. Type Magnetos. | 31th Jan 1928 | Box 65 \ 3 scan0177 | |
| Handing over two Watford EW.6 magnetos for a noise test. | 2nd Feb 1928 | Box 65 \ 3 scan0178 | |
| Tentative specification and initial test results for the Watford Type EW6 magneto for the Phantom chassis. | 3rd Feb 1928 | Box 65 \ 3 scan0179 | |
| Production inspection and test specification for a Watford Type EW6 Magneto. | 4th Jan 1928 | Box 65 \ 3 scan0180 | |
| Page 2 of test procedures for electrical components like magnetos and circuits. | 4th Jan 1928 | Box 65 \ 3 scan0181 | |
| Page of a magneto testing procedure detailing sparking speeds and meshing checks. | 2nd Feb 1928 | Box 65 \ 3 scan0182 | |
| Faults with the ignition hand control and magneto, with suggestions for improvements. | 2nd Feb 1928 | Box 65 \ 3 scan0183 | |
| The testing of four EW6 magnetos and the causes of the noise they produced. | 3rd Mar 1928 | Box 65 \ 3 scan0184 | |
| Production inspection and test log for a Watford Type EW6 Magneto. | 3rd Feb 1928 | Box 65 \ 3 scan0185 | |
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