| Description | Date | Identifier | |
| Differences between Lucas and Watford drawings for a 40/50HP Chassis Magneto. | 8th Oct 1925 | Box 40 \ 2 Scan058 | |
| Comparison of a Lucas magneto against a standard Watford magneto for an EAC, noting dimensional differences. | 12th Oct 1925 | Box 40 \ 2 Scan059 | |
| Communication regarding modifications to Lucas Magnetos for EAC, specifically a new thread on the driving spindle. | 19th Oct 1925 | Box 40 \ 2 Scan060 | |
| Expected despatch of Lucas Magnetos for EAC. | 30th Nov 1925 | Box 40 \ 2 Scan061 | |
| Letter from Joseph Lucas Limited regarding alterations to magnetos for quieter running. | 23th Dec 1925 | Box 40 \ 2 Scan062 | |
| Magnetos from Lucas and Simms for the new Phantom chassis. | 5th Jan 1926 | Box 40 \ 2 Scan063 | |
| The performance and suitability of Lucas and Simms magnetos, including proposed modifications. | 5th Jan 1926 | Box 40 \ 2 Scan064 | |
| Preliminary report on a visit to the Lucas factory regarding the manufacture and production of magnetos. | 14th Dec 1925 | Box 40 \ 2 Scan065 | |
| Component specifications and test instructions for an experimental magneto. | 29th Jun 1920 | Box 40 \ 2 Scan066 | |
| Form recording the design and performance details of a magneto. | 17th Dec 1925 | Box 40 \ 2 Scan067 | |
| Specifications for primary point gap, contact breaker timing, and automatic advance characteristics. | 17th Dec 1925 | Box 40 \ 2 Scan068 | |
| Test report detailing results from endurance, short circuit, and open circuit tests. | 17th Dec 1925 | Box 40 \ 2 Scan069 | |
| Test results for a primary circuit, including ampere-speed curves and sparking characteristics. | 17th Dec 1925 | Box 40 \ 2 Scan070 | |
| Test results for secondary milliamps, primary point gap, and contact breaker timing. | 17th Dec 1925 | Box 40 \ 2 Scan071 | |
| Remarks regarding the silence of operation, noting noisy bearings. | 11th Jan 1926 | Box 40 \ 2 Scan072 | |
| Bench testing of a Lucas magneto and a forthcoming modified version. | 11th Jan 1926 | Box 40 \ 2 Scan073 | |
| Letter postponing a visit from Dr. Turner of Joseph Lucas Ltd regarding magnetos for E.A.C. | 20th Jan 1926 | Box 40 \ 2 Scan074 | |
| Letter from Joseph Lucas Ltd. proposing an appointment to test a new magneto for quiet running on a chassis. | 19th Jan 1926 | Box 40 \ 2 Scan075 | |
| Confirming receipt of a Lucas magneto and reminding of an upcoming meeting with Dr. Turner. | 28th Jan 1926 | Box 40 \ 2 Scan076 | |
| Table of lowest speeds in RPM for various magnetos for regular firing on 5.5 mm gaps in air. | 29th Jan 1926 | Box 40 \ 2 Scan077 | |
| The return of two Lucas magnetos and proposed alterations for future supplied machines. | 29th Jan 1926 | Box 40 \ 2 Scan078 | |
| Electrical experimental record sheet for a Lucas type EBA6 Magneto No 156. | 29th Jan 1926 | Box 40 \ 2 Scan079 | |
| Graph of the O.C. Volts and S.C. Ampere-Speed characteristics for the primary winding of Lucas EBA6 and Simms SR6L type magnetos. | 8th Jan 1926 | Box 40 \ 2 Scan080 | |
| Stamped cover page from the Print Room in Derby. | 27th Jan 1926 | Box 40 \ 2 Scan081 | |
| Test report for a Lucas Magneto Type EBA6 No. 155. | 1st Feb 1926 | Box 40 \ 2 Scan082 | |
| Correspondence with supplier J. Lucas Ltd. concerning alterations to magnetos. | 5th Feb 1926 | Box 40 \ 2 Scan083 | |
| Customer's conditional order pending experiments with a Lucas Magneto. | 11th Feb 1926 | Box 40 \ 2 Scan084 | |
| The testing status and progress of the Lucas Magneto. | 2nd Feb 1926 | Box 40 \ 2 Scan085 | |
| Requesting a Lucas magneto for experimentation, highlighting its advantage of requiring less force to operate. | 15th Feb 1926 | Box 40 \ 2 Scan086 | |
| Correspondence with Joseph Lucas Ltd. regarding the progress and delivery schedule for two sample magnetos. | 17th Mar 1926 | Box 40 \ 2 Scan087 | |
| The receipt of a Lucas magneto for bench tests. | 27th Mar 1926 | Box 40 \ 2 Scan088 | |
| Graph of Open Circuit Volt-Speed and Short Circuit Ampere-Speed curves for the primary winding of a Lucas ER6 Magneto No. 50. | 1st Apr 1936 | Box 40 \ 2 Scan089 | |
| Specification sheet comparing distributor dimensions with suggested dimensions for the Lucas Magneto Type ER6 No. 50. | 1st Apr 1936 | Box 40 \ 2 Scan090 | |
| Specification table for the Lucas Magneto Type ERS No. 50, comparing distributor dimensions. | 21th Apr 1926 | Box 40 \ 2 Scan091 | |
| Confirming receipt of an advice note from Joseph Lucas Ltd. about the dispatch of an ER.6 magneto. | 21th Apr 1926 | Box 40 \ 2 Scan092 | |
| List of queries raised by Mr. North regarding the Lucas ER.6 Magneto. | 29th Mar 1926 | Box 40 \ 2 Scan093 | |
| Form recording the design and performance details of a Lucas ER6 magneto on test. | 29th Mar 1926 | Box 40 \ 2 Scan094 | |
| Specification sheet for ignition timing, primary point gap, and advance characteristics. | 29th Mar 1926 | Box 40 \ 2 Scan095 | |
| Test results for endurance, short circuit, and open circuit conditions, including a volt-speed curve. | 29th Mar 1926 | Box 40 \ 2 Scan096 | |
| On leaky gap performance, detailing engine speeds for different ignition timing settings. | 29th Mar 1926 | Box 40 \ 2 Scan097 | |
| Test data sheet detailing a closed-circuit primary ampere-speed curve, speed range, and sparking characteristics. | 29th Mar 1926 | Box 40 \ 2 Scan098 | |
| Test report detailing secondary milliamps, primary point gap, and contact breaker timing results. | 29th Mar 1926 | Box 40 \ 2 Scan099 | |
| Remarks on the operational silence of a specially made quiet magneto. | 12th Apr 1926 | Box 40 \ 2 Scan100 | |
| Letter from Joseph Lucas Ltd. regarding the specifications and performance of a new type of magneto. | 12th Apr 1926 | Box 40 \ 2 Scan101 | |
| Letter from Joseph Lucas Ltd. concerning sending a machine for performance checks. | 12th Apr 1926 | Box 40 \ 2 Scan102 | |
| Test results for a Magneto type E.R.6, showing utility values in Micromhos with various cams. | 12th Apr 1926 | Box 40 \ 2 Scan103 | |
| Table of data showing minimum sparking speeds for magnetos at various timing positions and cam angles. | 12th Apr 1926 | Box 40 \ 2 Scan104 | |
| Specification sheet for minimum sparking speeds and leading distributor dimensions. | 24th Apr 1926 | Box 40 \ 2 Scan105 | |
| Form recording the design and performance details of a magneto on test. | 24th Apr 1926 | Box 40 \ 2 Scan106 | |
| Engine ignition timing specifications for point gap, contact breaker timing, and automatic advance characteristics. | 24th Apr 1926 | Box 40 \ 2 Scan107 | |
| Test report page detailing the results of various electrical circuit tests. | 24th Apr 1926 | Box 40 \ 2 Scan108 | |
| Test results page detailing sparking characteristics, speed range, and other performance data. | 24th Apr 1926 | Box 40 \ 2 Scan109 | |
| Test report detailing secondary milliamps, primary point gap, and contact breaker timing measurements. | 24th Apr 1926 | Box 40 \ 2 Scan110 | |
| The quiet operation of a magneto and the tangential force required to move a cam cover. | 4th May 1926 | Box 40 \ 2 Scan111 | |
| Comparison of Lucas and Watford magnetos for the Phantom model, advising against the cheaper option to protect the company's reputation. | 4th May 1926 | Box 40 \ 2 Scan112 | |
| Comparing the Lucas magneto with the standard Watford magneto, proposing tests on the newer Lucas ER6 model. | 7th Jun 1926 | Box 40 \ 2 Scan113 | |
| Analysis of issues with the standard Watford magneto and a list of proposed improvements for the Lucas magneto. | 4th Jun 1926 | Box 40 \ 2 Scan114 | |
| Advantages of a new magneto design and proposals for testing on an experimental chassis. | 4th Jun 1926 | Box 40 \ 2 Scan115 | |
| Comparative testing of the Lucas magneto against the standard Watford magneto for potential standardization. | 7th Jun 1926 | Box 40 \ 2 Scan116 | |
| Report page discussing a guarantee of reliability from the Lucas Co. for a magneto and a recent visit by Mr. North. | 8th Jun 1926 | Box 40 \ 2 Scan117 | |
| Comparing Lucas and Watford magnetos regarding production methods, cost, design, and brand reputation. | 8th Jun 1926 | Box 40 \ 2 Scan118 | |
| Magneto reliability, comparing Watford and Lucas products and the potential impact on brand reputation. | 8th Jun 1926 | Box 40 \ 2 Scan119 | |
| Letter from a director at Peto & Radford giving initial impressions on a newly fitted Lucas magneto. | 5th Jul 1926 | Box 40 \ 2 Scan120 | |
| Form recording the design and performance details of a Lucas ER6 magneto under test. | 10th Aug 1926 | Box 40 \ 2 Scan121 | |
| Specifications for primary point gap and contact breaker timing. | 10th Aug 1926 | Box 40 \ 2 Scan122 | |
| Test report page detailing endurance, circuit tests, and an open circuit primary volt-speed curve. | 10th Aug 1926 | Box 40 \ 2 Scan123 | |
| Test results for a closed circuit primary ampere-speed curve and sparking characteristics. | 10th Aug 1926 | Box 40 \ 2 Scan124 | |
| Test results for secondary milliamps, primary point gap, and contact breaker timing. | 10th Aug 1926 | Box 40 \ 2 Scan125 | |
| Remarks on the silence of operation and a tangential force measurement. | 10th Aug 1926 | Box 40 \ 2 Scan126 | |
| Request to install a Lucas ER6 magneto on chassis 8-EX and return the existing Watford magneto. | 19th Aug 1926 | Box 40 \ 2 Scan127 | |
| 6000-mile performance report on Chassis 12-EX, focusing on the magneto, battery ignition, and ignition governor. | 19th Aug 1926 | Box 40 \ 2 Scan128 | |
| Extract from a letter from Peto & Radford regarding a special dynamo and the performance of a Lucas magneto. | 23th Aug 1926 | Box 40 \ 2 Scan129 | |
| Chassis 12-EX, EAC.8 after a 9,000-mile test, focusing on the magneto and battery ignition systems. | 23th Aug 1926 | Box 40 \ 2 Scan130 | |
| Test results for two Lucas ER6 magnetos, numbers 53 and 54b, for fitting to an experimental chassis. | 8th Sep 1926 | Box 40 \ 2 Scan131 | |
| Forgotten Lucas magneto for chassis No. 12-EX. | 24th Sep 1926 | Box 40 \ 2 Scan132 | |
| The return of a Lucas magneto for chassis 12-EX. | 27th Sep 1926 | Box 40 \ 2 Scan133 | |
| Examination report on a faulty Lucas ER6 magneto from a 12EX model. | 5th Oct 1926 | Box 40 \ 2 Scan134 | |
| Instructions sheet with handwritten notes on a suspected magneto failure due to contact breaker points. | 5th Oct 1926 | Box 40 \ 2 Scan135 | |
| Extract from a letter from Peto & Radford regarding the performance of a Lucas magneto. | 5th Oct 1926 | Box 40 \ 2 Scan136 | |
| Internal memorandum discussing the performance and testing of Lucas type ERS magnetos. | 5th Oct 1926 | Box 40 \ 2 Scan137 | |
| Covering letter for reports on a 10,000-mile magneto test and its return to Messrs. Lucas for examination. | 5th Oct 1926 | Box 40 \ 2 Scan138 | |
| Examination report on a faulty Lucas ERS Magneto No. 51. | 5th Oct 1926 | Box 40 \ 2 Scan139 | |
| Extract of a communication to Peto & Radford regarding the testing and standardisation of a Lucas magnetow. | 7th Oct 1926 | Box 40 \ 2 Scan140 | |
| Report on the Lucas Magneto to be passed to Messrs. Lucas. | 12th Oct 1926 | Box 40 \ 2 Scan141 | |
| Investigation into the burning of distributors on Lucas magnetos following complaints and laboratory tests. | 26th Sep 1926 | Box 40 \ 2 Scan142 | |
| Continued report on distributor misfiring issues, suggesting better curing and increased carbon brush pressure as a remedy. | 11th Oct 1926 | Box 40 \ 2 Scan143 | |
| Form recording the design and performance details of a magneto on test. | 11th Oct 1926 | Box 40 \ 2 Scan144 | |
| Specifications for contact breaker timing and automatic advance characteristics. | 11th Oct 1926 | Box 40 \ 2 Scan145 | |
| Test report detailing results of endurance, short circuit, and open circuit tests, including a volt-speed curve. | 11th Oct 1926 | Box 40 \ 2 Scan146 | |
| Test results for a closed circuit primary ampere-speed curve and sparking characteristics. | 11th Oct 1926 | Box 40 \ 2 Scan147 | |
| Test results for contact breaker timing, primary point gap, and secondary milliamps. | 11th Oct 1926 | Box 40 \ 2 Scan148 | |
| Remarks on the silence of operation of a magneto and a measurement of tangential force. | 20th Oct 1926 | Box 40 \ 2 Scan149 | |
| With observations and suggestions for improving Lucas magnetos. | 20th Oct 1926 | Box 40 \ 2 Scan150 | |
| Cover letter sending a previously omitted copy of an assistant's report on the Lucas magneto. | 20th Oct 1926 | Box 40 \ 2 Scan151 | |
| Potential adoption of a Lucas magneto for the Phantom chassis. | 25th Dec 1928 | Box 40 \ 2 Scan152 | |
| Comparison of relative distributor dimensions for the Lucas Magneto Type ERS. | 28th Oct 1926 | Box 40 \ 2 Scan153 | |
| Table of distributor dimensions, relative pitches, and actual measurements for a Lucas ER6 Magneto No. 54b. | 28th Oct 1926 | Box 40 \ 2 Scan154 | |
| Arguing for continued experimental work on the Lucas Type ER6 Magneto based on its promising technical characteristics compared to the Watford magneto. | 29th Oct 1926 | Box 40 \ 2 Scan155 | |
| Suggestion to consider the Lucas magneto as a second option, noting their two-year guarantee. | 1st Nov 1926 | Box 40 \ 2 Scan156 | |
| Relative merits of Lucas, Watford, and Bosch magnetos for various engine models. | 1st Nov 1926 | Box 40 \ 2 Scan157 | |
| | | | |