| Description | Date | Identifier | |
| Issues with lever seizure due to oxydization and a case of spring breakage. | 18th May 1927 | Box 70 \ 3 scan0091 | |
| Planned visit to Cricklewood to improve electrical fault diagnosis methods. | 8th May 1931 | Box 70 \ 3 scan0092 | |
| The issue of ignition components being incorrectly returned as faulty from Repair Depots. | 8th May 1931 | Box 70 \ 3 scan0093 | |
| Ignition system troubleshooting procedures for repair depots. | 8th May 1931 | Box 70 \ 3 scan0094 | |
| Suggested procedure for diagnosing battery ignition troubles on customer chassis. | 20th May 1931 | Box 70 \ 3 scan0095 | |
| The failure to record mileage during a condenser change on chassis GLR-8. | 21th May 1931 | Box 70 \ 3 scan0096 | |
| Cover letter regarding a suggested method for diagnosing battery ignition troubles on customer chassis. | 23th May 1931 | Box 70 \ 3 scan0097 | |
| Suggested procedure for tracing ignition troubles on a customer's chassis. | 23th May 1931 | Box 70 \ 3 scan0098 | |
| Visit to Cricklewood to investigate customer complaints regarding battery ignition systems. | 23th May 1931 | Box 70 \ 3 scan0099 | |
| Customer complaints regarding a starter motor and switchbox repairs, along with a proposed testing scheme for ignition failures. | 23th May 1931 | Box 70 \ 3 scan0100 | |
| Lack of voltmeters for diagnosing battery ignition troubles on customer chassis. | 23th May 1931 | Box 70 \ 3 scan0101 | |
| Instruction regarding the investigation of a Berenett ignition coil (No. 4554) that fails on a specific chassis. | 29th Apr 1927 | Box 70 \ 3 scan0102 | |
| Responding to a query about Ignition Coil No. 4554, outlining the investigation and testing process. | 17th May 1927 | Box 70 \ 3 scan0103 | |
| Confirming that tests on ignition coil No.4554 show no faults. | 10th Jun 1927 | Box 70 \ 3 scan0104 | |
| Request for a report on recent failures of ignition coils on customers' cars. | 20th Dec 1927 | Box 70 \ 3 scan0105 | |
| Internal memorandum clarifying the process for handling customer complaints regarding ignition coil and other electrical failures. | 19th Dec 1927 | Box 70 \ 3 scan0106 | |
| Customer complaints about ignition coil failures and the high number of replacement coils being supplied for 20HP and 40/50HP chassis. | 19th Dec 1927 | Box 70 \ 3 scan0107 | |
| The replacement of coils on 20 HP and 40/50 HP chassis, requesting a percentage-based comparison between locations. | 22th Dec 1927 | Box 70 \ 3 scan0108 | |
| Number of ignition coils issued in 1927 and addressing potential concerns over defects. | 23th Dec 1927 | Box 70 \ 3 scan0109 | |
| Coil replacement rates and procedures for 20HP and 40/50HP models. | 30th Dec 1927 | Box 70 \ 3 scan0110 | |
| Failure of an Ignition Coil Y.C.95, requesting examination and rewinding. | 12th Jan 1928 | Box 70 \ 3 scan0111 | |
| Query about a misunderstanding regarding the replacement policy for coils on 20-HP & 40/50 HP chassis. | 5th Jan 1928 | Box 70 \ 3 scan0112 | |
| From the repair department about the diagnosis and return of a faulty coil YC.95. | 6th Jan 1928 | Box 70 \ 3 scan0113 | |
| Faulty new coil, No. 6494 from Chassis 20-NE, which failed after two days. | 11th Jan 1928 | Box 70 \ 3 scan0114 | |
| Faulty coil from chassis 66-EF, detailing a short circuit and requesting examination for repair costs. | 11th Jan 1928 | Box 70 \ 3 scan0115 | |
| Replacement of a faulty ignition coil from chassis 20-NE against Works' policy. | 12th Jan 1928 | Box 70 \ 3 scan0116 | |
| Replacement of a returned coil for chassis 66-EF against Works' policy. | 12th Jan 1928 | Box 70 \ 3 scan0117 | |
| Replacement of coils for 20HP and 40/50HP chassis. | 13th Jan 1928 | Box 70 \ 3 scan0118 | |
| Policy for charging for the replacement of coils. | 11th Jan 1928 | Box 70 \ 3 scan0119 | |
| Policy for replacing coils on 20HP and 40/50HP chassis. | 10th Jan 1928 | Box 70 \ 3 scan0120 | |
| Instruction note regarding a faulty coil from chassis 38RM requiring repair and return to Cricklewood. | 19th Jan 1928 | Box 70 \ 3 scan0121 | |
| Instruction sheet detailing the examination and fault diagnosis of a coil from a customer's chassis. | 21th Jan 1928 | Box 70 \ 3 scan0122 | |
| Intermittent coil failure on chassis 38-NC, clarifying guarantee status and repair costs. | 23th Jan 1928 | Box 70 \ 3 scan0123 | |
| Instruction sheet detailing the findings from an examination of a faulty coil from a repair chassis. | 26th Jan 1928 | Box 70 \ 3 scan0124 | |
| Examination and findings on a faulty coil, No. 4164, from a repair chassis. | 27th Jan 1928 | Box 70 \ 3 scan0125 | |
| Instruction sheet detailing the examination and fault diagnosis of two faulty coils. | 3rd Feb 1928 | Box 70 \ 3 scan0126 | |
| The failure analysis of a coil, identifying wet varnish and charring as issues. | 9th Dec 1924 | Box 70 \ 3 scan0127 | |
| Investigation report into two faulty coils, nos. 4405 and T145X, from the repair department. | 4th Feb 1928 | Box 70 \ 3 scan0128 | |
| Investigation into overheating, charring, and weakness in finer primary and secondary coils. | 30th Mar 1928 | Box 70 \ 3 scan0129 | |
| Complaint of a faulty coil with a broken secondary winding for chassis No. 4-UF. | 30th Mar 1928 | Box 70 \ 3 scan0130 | |
| Faulty D.70982 coil from chassis 6.EF, requesting examination and advice on repair costs. | 16th Apr 1928 | Box 70 \ 3 scan0131 | |
| Intermittent coil failure on Chassis 7-LF and a request for examination and cost allocation. | 18th Apr 1928 | Box 70 \ 3 scan0132 | |
| Faulty coil from chassis 83-MC and an inquiry about repair costs. | 18th Apr 1928 | Box 70 \ 3 scan0133 | |
| Failed ignition coil on chassis 6-EF for Captain A.S. Wills, agreeing to the charges. | 21th Apr 1928 | Box 70 \ 3 scan0134 | |
| Replacement of a failed ignition coil on chassis 83-MC and the potential for charging the customer. | 21th Apr 1928 | Box 70 \ 3 scan0135 | |
| Failed ignition coil on chassis 7-LF and agreeing to debit the charges for a new one. | 21th Apr 1928 | Box 70 \ 3 scan0136 | |
| Requesting specific details on ignition coil failures, including winding type, resistance, and engine position. | 18th Mar 1929 | Box 70 \ 3 scan0137 | |
| Investigation into a failed ignition coil on chassis 101-UF, detailing electrical faults and concluding the cause was an open battery circuit. | 10th Oct 1929 | Box 70 \ 3 scan0138 | |
| Remedy of using an auto switch control to protect against recurring danger. | 17th Dec 1931 | Box 70 \ 3 scan0139 | |
| Failed D.72503 coil from chassis 5.GY which has overheated. | 17th Dec 1931 | Box 70 \ 3 scan0140 | |
| Faulty condenser on chassis 55.RF for customer J. Blake & Co. Ltd. | 15th Feb 1928 | Box 70 \ 3 scan0141 | |
| From EFC to BY requesting the return of a faulty condenser and two cutouts for examination. | 7th Feb 1928 | Box 70 \ 3 scan0142 | |
| Testing of a failed condenser, No. MO.55, from chassis 55RF. | 21th Feb 1928 | Box 70 \ 3 scan0143 | |
| Laboratory report on the cause of failure for Condenser No. MO.55 from chassis 55 RF. | 20th Feb 1928 | Box 70 \ 3 scan0144 | |
| Complaint about a faulty condenser on chassis 97-RF. | 14th May 1928 | Box 70 \ 3 scan0145 | |
| The cost allocation for a condenser from chassis 97-RF Cricklewood. | 17th May 1928 | Box 70 \ 3 scan0146 | |
| Investigation into a distributor with pitting on the platinum points, concluding the cause is oil vapour. | 30th Dec 1925 | Box 70 \ 3 scan0147 | |
| Investigation into why the platinum points burnt away on distributor No.65 from chassis 18-RC. | 29th Dec 1925 | Box 70 \ 3 scan0148 | |
| Letter detailing the investigation into battery ignition point failure due to excessive voltage. | 27th May 1926 | Box 70 \ 3 scan0149 | |
| Electrical tests of a dynamo and battery ignition system on a Phantom chassis. | 27th May 1926 | Box 70 \ 3 scan0150 | |
| Electrical fault related to an excessive voltage rise. | 28th May 1926 | Box 70 \ 3 scan0151 | |
| Inquiring about a new design to resolve a complaint regarding Phantom Ignition. | 28th May 1926 | Box 70 \ 3 scan0152 | |
| Listing cars with complaints of burning out platinum ignition points on Phantom models. | 28th May 1926 | Box 70 \ 3 scan0153 | |
| Unreliability and varying lifespan of make-and-break contacts for the Phantom ignition system. | 27th May 1926 | Box 70 \ 3 scan0154 | |
| Phantom owner's battery ignition issue and questioning if high battery voltage is the cause. | 28th May 1926 | Box 70 \ 3 scan0155 | |
| Letter to a Mr. Sidney regarding ignition tests, battery voltage, and sparking on a Phantom model. | 28th Mar 1926 | Box 70 \ 3 scan0156 | |
| Letter discussing dynamo voltage and a suspected incorrect voltmeter reading. | 29th May 1926 | Box 70 \ 3 scan0157 | |
| The life of contact points for the Phantom ignition system, detailing tests and improvements. | 29th May 1926 | Box 70 \ 3 scan0158 | |
| Copy of a letter from F.E. Sidney concerning an ignition issue with his Phantom. | 30th May 1926 | Box 70 \ 3 scan0159 | |
| Letter to Mr. Northey discussing abnormal voltage issues with accumulators, meters, and lamp bulbs. | 30th Mar 1926 | Box 70 \ 3 scan0160 | |
| Page 2 of a letter discussing dynamo overcharging and its effect on batteries. | 1st Jun 1926 | Box 70 \ 3 scan0161 | |
| Phantom ignition and charging voltage, discussing the deterioration of platinum points due to oil vapour. | 1st Jun 1926 | Box 70 \ 3 scan0162 | |
| Diagnosis of blackened distributor points, concluding the cause is oil vapour, not an electrical fault. | 1st Jun 1926 | Box 70 \ 3 scan0163 | |
| Technical explanation of vehicle electrical system voltage, battery charging characteristics, and their effect on lamp filaments. | 1st Jun 1926 | Box 70 \ 3 scan0164 | |
| Technical analysis of the interaction between battery and dynamo voltages within an electrical charging system. | 1st Jun 1926 | Box 70 \ 3 scan0165 | |
| Continued report discussing battery E.M.F. and a specific car's oil vapour trouble. | 2nd Jun 1926 | Box 70 \ 3 scan0166 | |
| Letter detailing an investigation into electrical faults, specifically battery ignition points and lamp bulb failures on a Phantom chassis. | 2nd Jun 1926 | Box 70 \ 3 scan0167 | |
| Page two of a letter from F.E. Sidney regarding a dangerous fault with a car's lights. | 4th Jun 1926 | Box 70 \ 3 scan0168 | |
| Customer's issue with ignition make-and-break burning, battery over-charging, and potential solutions. | 4th Jun 1926 | Box 70 \ 3 scan0169 | |
| Oil excluding device for Phantom ignition, chassis batteries, and side lamp voltages. | 7th Jun 1926 | Box 70 \ 3 scan0170 | |
| Technical note on the advantages of using higher-rated lamps in a 12-volt car system. | 7th Jun 1926 | Box 70 \ 3 scan0171 | |
| Rapid failure of platinum battery ignition points and proposing further investigation. | 25th Aug 1926 | Box 70 \ 3 scan0172 | |
| Concerning the reported failure of a Distributor Cover for Chassis No. 49-LC and arranging its replacement. | 26th Aug 1926 | Box 70 \ 3 scan0173 | |
| Customer complaint regarding a cracked distributor cover for chassis No. 49-LC. | 25th Aug 1925 | Box 70 \ 3 scan0174 | |
| The failure of a magneto distributor on chassis 49-LC, attributed to material contraction from insufficient curing. | 26th Aug 1926 | Box 70 \ 3 scan0175 | |
| The preparation and replacement of new ignition contact breaker parts due to the burning of platinum points. | 11th Sep 1926 | Box 70 \ 3 scan0176 | |
| Burning of platinum battery ignition contact points due to oil presence in a customer's car and on Phantom models. | 14th Sep 1926 | Box 70 \ 3 scan0177 | |
| Parts for a modification to exclude crankchamber gasses from Mr. Storey's car. | 14th Sep 1926 | Box 70 \ 3 scan0178 | |
| The preparation of new ignition contact breaker parts to fix an issue with burning platinum points. | 11th Sep 1926 | Box 70 \ 3 scan0179 | |
| Customer's modifications to his car's battery ignition system. | 22th Sep 1926 | Box 70 \ 3 scan0180 | |
| Cases of failure in battery ignition H.T. rotors due to tracking. | 6th May 1927 | Box 70 \ 3 scan0181 | |
| Responding to a query about the number of failures observed in H.T. rotors for batteries. | 6th May 1927 | Box 70 \ 3 scan0182 | |
| Letter from C. A. Vandervell & Co. Ltd. requesting condenser capacity information for a 'Phantom' car. | 6th Mar 1928 | Box 70 \ 3 scan0183 | |
| Letter to Mr. W.H. Glaser regarding the burning of platinum points on a Phantom, discussing condenser capacity and a new contact breaker design. | 7th Mar 1928 | Box 70 \ 3 scan0184 | |
| Continuation of a letter discussing a potential customer complaint and offered improvements. | 9th Mar 1928 | Box 70 \ 3 scan0185 | |
| Letter from C.A. Vandervell & Co. Ltd. to E. Fowler Clark regarding the action of oil vapour and mechanical actions. | 9th Mar 1928 | Box 70 \ 3 scan0186 | |
| Recording the failure of Bakelite distributor rotors from Phantom models. | 11th May 1928 | Box 70 \ 3 scan0187 | |
| Failures of ignition distributor rotors and the progress of tests on a new mushroom-type rotor design. | 2nd May 1928 | Box 70 \ 3 scan0188 | |
| Missing cut-out and distribution board, troubleshooting a returned cut-out, and clarifying the ambiguous term 'cut-out'. | 4th Dec 1925 | Box 70 \ 3 scan0189 | |
| Instructions concerning a returned cut-out from a chassis, reported as faulty and sent for testing. | 5th Dec 1925 | Box 70 \ 3 scan0190 | |
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