| Description | Date | Identifier | |
| On the testing of a condenser from chassis 38-ZG, finding it operational but recommending a new earthing connection to remedy a fault. | 1st Apr 1924 | Box 46 \ 3 Scan248 | |
| Instruction sheet regarding the testing of a condenser from chassis 38ZG and fault diagnosis. | 2nd Apr 1924 | Box 46 \ 3 Scan249 | |
| Faulty condenser from a 40/50 HP Chassis causing the platinum points to burn away. | 17th Jun 1924 | Box 46 \ 3 Scan250 | |
| Instruction note detailing the failure of a 40/50 mica condenser during a production test due to a suspected faulty earth connection. | 18th Jun 1924 | Box 46 \ 3 Scan251 | |
| Test failure of a 40/50 Mica Condenser No. 2818. | 18th Jun 1924 | Box 46 \ 3 Scan252 | |
| Title page for the Distributor & Contact Breaker. | 14th Mar 1923 | Box 46 \ 3 Scan253 | |
| Complaint about wear on the contact breaker platinum tip blade for a 40/50 distributor. | 14th Mar 1923 | Box 46 \ 3 Scan254 | |
| Complaint about excessive wear on battery ignition contact breaker rollers and pins. | 13th Mar 1923 | Box 46 \ 3 Scan255 | |
| Title page for a document about contact points. | 13th Mar 1923 | Box 46 \ 3 Scan256 | |
| Title page for a section on magnetos. | 4th Jan 1922 | Box 46 \ 3 Scan257 | |
| Instruction to replace a B.G. type magneto with a Watford M.O.6. type on chassis 77-YX for customer Ambatielos, following a complaint. | 4th Jan 1922 | Box 46 \ 3 Scan258 | |
| Customer's complaint about a failed Watford magneto and requesting information on fitting a Bosch magneto to chassis 62.H.2. | 15th Oct 1923 | Box 46 \ 3 Scan259 | |
| The transfer of an E.O.6. Magneto for Chassis No. 12-EM. | 12th Nov 1923 | Box 46 \ 3 Scan260 | |
| Magneto failures on the 40/50 model, a faulty brush holder, and the need for spare parts and communication with the customer. | 2nd Nov 1923 | Box 46 \ 3 Scan261 | |
| Investigating a fault on an E.O.6 Magneto from chassis 12EO. | 13th Nov 1923 | Box 46 \ 3 Scan262 | |
| Failures of the high tension pick-up on Watford Magnetos and the urgent need for improved brush holders. | 31th Dec 1923 | Box 46 \ 3 Scan263 | |
| Noisy E.O.6 magnetos on 40/50 cars. | 9th Jan 1924 | Box 46 \ 3 Scan264 | |
| Seized magneto (No. 56915), identifying a galled cam box sleeve and requesting a replacement from the makers. | 18th Jan 1924 | Box 46 \ 3 Scan265 | |
| Contact breaker noisiness of the Watford E.O.6 Magneto for the 20 HP engine. | 23th Jan 1924 | Box 46 \ 3 Scan266 | |
| Seeking clarification on the term 'fibre friction brush' in an E.O.6 magneto for chassis No.11-TW. | 14th Mar 1924 | Box 46 \ 3 Scan267 | |
| Confirming a telephone message regarding the distributor wheel brake friction brush and an agreed alteration to the Instruction Book. | 17th Mar 1924 | Box 46 \ 3 Scan268 | |
| Customer complaint about a faulty Watford Magneto and its replacement with a Bosch unit. | 21th Mar 1924 | Box 46 \ 3 Scan269 | |
| Modifying a magneto contact breaker for testing due to a complaint of burning points. | 31th Mar 1924 | Box 46 \ 3 Scan270 | |
| Test results for a Watford E.6 Magneto from chassis 115-EE, detailing its slow speed sparking characteristics. | 24th Apr 1924 | Box 46 \ 3 Scan271 | |
| Test report for a Watford E6 Magneto, serial number 23071. | 23th Apr 1924 | Box 46 \ 3 Scan272 | |
| The return of a faulty magneto and another one received in error. | 19th May 1924 | Box 46 \ 3 Scan273 | |
| The breakdown and diagnosis of a Watford E6 magneto from chassis 76-CE. | 19th May 1924 | Box 46 \ 3 Scan274 | |
| Testing two E.6 magnetos from different cars to check for excessive wear. | 9th May 1924 | Box 46 \ 3 Scan275 | |
| Requesting an independent test on a magneto from chassis 50-FW returned for being too noisy. | 20th May 1924 | Box 46 \ 3 Scan276 | |
| The results of a test and examination of a Watford magneto from chassis 50-FW. | 23th May 1924 | Box 46 \ 3 Scan277 | |
| Test and examination report for a Watford EO6 Magneto, serial number 56991. | 22th May 1924 | Box 46 \ 3 Scan278 | |
| Cover page for a document or section regarding the Dynamo. | 1st Dec 1919 | Box 46 \ 3 Scan279 | |
| Dynamo lighting failure due to faulty fuse fixing, with a suggestion to use tin-lead type fuses instead. | 1st Dec 1919 | Box 46 \ 3 Scan280 | |
| The failure of a dynamo lighting system caused by a sticking automatic cut-out switch, leading to battery discharge. | 10th Dec 1919 | Box 46 \ 3 Scan281 | |
| The failure of dynamos due to water ingress and subsequent rust, with proposed solutions. | 11th Feb 1920 | Box 46 \ 3 Scan282 | |
| Recurring failure with Lucas Dynamo terminals and a request to halt further testing until a modification is implemented. | 5th Mar 1920 | Box 46 \ 3 Scan283 | |
| Ongoing issues with noisy Lucas dynamos on cars under test. | 17th Jan 1922 | Box 46 \ 3 Scan284 | |
| Two faulty Lucas dynamos and their replacement. | 23th Feb 1921 | Box 46 \ 3 Scan285 | |
| Faulty ball bearings in Lucas Dynamos on the 10,000-mile production car, 12-HN. | 4th Dec 1923 | Box 46 \ 3 Scan286 | |
| Correspondence with Joseph Lucas Ltd. regarding the examination of a dynamo's bearings from a 12-EM trial car. | 4th Jan 1924 | Box 46 \ 3 Scan287 | |
| Complaints from the Paris Depot about poor insulation and output loss in Lucas Dynamos. | 30th Apr 1924 | Box 46 \ 3 Scan288 | |
| Correspondence concerning a dynamo and battery issue for a car belonging to the Maharaja of Patiala, necessitating discussions with the Lucas Company. | 15th Aug 1923 | Box 46 \ 3 Scan289 | |
| Letter from the Motor Department in Patiala, India, regarding unsatisfactory headlight performance on hill roads. | 16th Jul 1923 | Box 46 \ 3 Scan290 | |
| Technical discussion on dynamo specifications and the problematic, inaccessible placement of accumulators on car chassis. | 23th Aug 1923 | Box 46 \ 3 Scan291 | |
| Upgrades to the dynamo and battery for the Patiala car to fix inadequate charging at low speeds. | 23th Aug 1923 | Box 46 \ 3 Scan292 | |
| Running test of a larger Lucas dynamo for the Patiala customer. | 29th Aug 1923 | Box 46 \ 3 Scan293 | |
| Instructions to test a larger Lucas dynamo for a 40/50 HP chassis for a customer in Patiala. | 30th Aug 1923 | Box 46 \ 3 Scan294 | |
| Cover letter enclosing a report regarding Lord Furness's cars for further action. | 22th Dec 1919 | Box 47 \ 1 Scan001 | |
| Lord Furness's car fleet, his interest in competing brands, and fitting an aero engine to a chassis. | 6th Dec 1919 | Box 47 \ 1 Scan002 | |
| Forwarding a copy of a letter from Mr. Northey concerning Lord Rocksavage's Car. | 16th Mar 1920 | Box 47 \ 1 Scan003 | |
| Copy of a letter from 'PN' to 'CJ' discussing car performance, a potential 'Speed-model', and issues with temperature and steering. | 8th Mar 1920 | Box 47 \ 1 Scan004 | |
| Page 2 of a report on car performance after four thousand miles, with observations from the Riviera. | 19th Nov 1919 | Box 47 \ 1 Scan005 | |
| Copy of a telegram from PN to CJ regarding shock absorbers for Rocksavage. | 8th Mar 1920 | Box 47 \ 1 Scan006 | |
| Copy of a telegram from JS to CJ regarding Rocksavage's positive feedback on shock absorbers. | 11th Mar 1920 | Box 47 \ 1 Scan007 | |
| Lord Rocksavage's car, detailing a gearbox noise and arranging for repairs, standardisation, and road tests. | 20th Apr 1920 | Box 47 \ 1 Scan008 | |
| Multiple complaints and planned fixes for Lord Rocksavage's car, model 12-LY. | 26th Apr 1920 | Box 47 \ 1 Scan009 | |
| Issues with a vehicle's bonnet, brakes, and steering, along with recommended actions. | 1st Sep 1927 | Box 47 \ 1 Scan010 | |
| Report addressing a complaint of insufficient speed, detailing the investigation and discussing potential piston and axle modifications. | 1st Sep 1927 | Box 47 \ 1 Scan011 | |
| Magneto failures and gear noise issues on a customer's vehicle. | 20th Apr 1920 | Box 47 \ 1 Scan012 | |
| Customer complaint letter from 'Rocksavage' detailing six specific vehicle faults and poor engine performance. | 20th Apr 1920 | Box 47 \ 1 Scan013 | |
| Letter discussing Lord Rocksavage's requirements for his car, chassis 12-LW, focusing on speed and complaints. | 21th Apr 1920 | Box 47 \ 1 Scan014 | |
| Test drive and modifications to Lord Rocksavage's chassis, including performance feedback. | 7th May 1920 | Box 47 \ 1 Scan015 | |
| Critical opinion on a car's irritating springing, engine growl, performance, and cramped engine design. | 25th Aug 1919 | Box 47 \ 1 Scan016 | |
| Cover note attaching Report No. 1831 for chassis 1153, with a handwritten query about the weight difference between Rapson and standard tires. | 4th Oct 1920 | Box 47 \ 1 Scan017 | |
| Vehicle inspection and feedback report for chassis number 1153. | 28th Sep 1920 | Box 47 \ 1 Scan018 | |
| Technical report detailing feedback on engine performance, gears, and the driver's experience. | 19th Nov 1919 | Box 47 \ 1 Scan019 | |
| Page 3 of a vehicle test and condition report, detailing issues with tires, performance, and body type. | 19th Nov 1919 | Box 47 \ 1 Scan020 | |
| Updates to lighting and steering components, and noting the status of complaints. | 19th Nov 1919 | Box 47 \ 1 Scan021 | |
| Cover note regarding Chassis No. 68-TW for Alec Rea Esq., attaching copies of two other documents. | 12th Oct 1920 | Box 47 \ 1 Scan022 | |
| Complaint regarding the suspension on chassis 68-TW owned by Alec Rea, Esq. | 21th Sep 1920 | Box 47 \ 1 Scan023 | |
| The fitting of solid leaf rear springs to chassis No. 68-TW and the resulting improved springing. | 11th Oct 1920 | Box 47 \ 1 Scan024 | |
| Extract regarding a report on Chassis no. 2060E for Sir John Leigh of Newport. | 4th Nov 1920 | Box 47 \ 1 Scan025 | |
| Relaying an owner's letter about curing an engine misfire on magneto ignition by replacing spark plugs. | 9th Nov 1920 | Box 47 \ 1 Scan026 | |
| Performance of spark plugs and magnetos, including customer feedback. | 11th Mar 1920 | Box 47 \ 1 Scan027 | |
| Improvements to ignition plugs and condensers for chassis 39-TW. | 12th Nov 1920 | Box 47 \ 1 Scan028 | |
| Customer complaint regarding chassis No. 102-EE and its comparison to a Lanchester car. | 19th Apr 1921 | Box 47 \ 1 Scan029 | |
| Resolving issues with a customer's car, comparing performance post-repair, and observing the owner's driving habits. | 18th May 1921 | Box 47 \ 1 Scan030 | |
| Test report and negative review of a competitor's Lanchester car, comparing it unfavourably to their own vehicle. | 18th May 1921 | Box 47 \ 1 Scan031 | |
| Customer's suggestions regarding gaiters to prevent squeaking at the spring tips. | 30th May 1921 | Box 47 \ 1 Scan032 | |
| Letter to J.P. Baron regarding spring gaiters and adjustments for the battery ignition system. | 28th May 1921 | Box 47 \ 1 Scan033 | |
| Letter from a customer regarding custom oil retaining gaiters and requesting correct adjustment specifications for the platinum points. | 27th May 1921 | Box 47 \ 1 Scan034 | |
| Typed letter responding to a customer about issues with ill-fitting and defective rear spring gaiters. | 26th May 1921 | Box 47 \ 1 Scan035 | |
| Letter from the Inspecting Engineers' Department regarding a customer's car. | 2nd Jun 1928 | Box 47 \ 1 Scan036 | |
| Customer comparing his new car unfavourably to a Cadillac and planning a demonstration. | 13th Jul 1921 | Box 47 \ 1 Scan037 | |
| Continued memorandum discussing twelve-cylinder engine performance and a business matter concerning a Mr. Dugdale. | 14th Jul 1921 | Box 47 \ 1 Scan038 | |
| A customer's query on using Johnson's carbon remover for an engine that is 'pinking'. | 14th Jul 1921 | Box 47 \ 1 Scan039 | |
| Complaint from Mr. F. T. Fisher's driver about squeaking Wefco Gaiters. | 1st Aug 1921 | Box 47 \ 1 Scan040 | |
| Chassis 46-RE, arranging an inspection and noting a recent modification to the leaf springs. | 18th Aug 1921 | Box 47 \ 1 Scan041 | |
| Response to a driver's complaint about new springs not resolving issues with jerking and bumping noises. | 17th Aug 1921 | Box 47 \ 1 Scan042 | |
| Letter addressing potential causes of squeaks in the suspension and advising on tyre pressure. | 18th Aug 1921 | Box 47 \ 1 Scan043 | |
| Customer request to alter the springing on Chassis No. 5-RD to match their post-war car, No. 95AG. | 18th Aug 1921 | Box 47 \ 1 Scan044 | |
| Follow-up on the testing status of French-made sparking plugs offered by a customer for chassis 79-TW. | 9th Sep 1921 | Box 47 \ 1 Scan045 | |
| Fitting rear shock absorbers to Mr. Fisher's car, 46-RE, as an experimental job. | 15th Sep 1921 | Box 47 \ 1 Scan046 | |
| Internal memorandum discussing a water boiling issue and the effectiveness of fitting a smaller fan pulley. | 15th Sep 1921 | Box 47 \ 1 Scan047 | |
| Supply, cost, and fitting of rear shock absorbers for chassis 46-ME, requiring body alterations. | 15th Sep 1921 | Box 47 \ 1 Scan048 | |
| Departmental memo detailing customer feedback on weak parts, specifically fan blades and rear axle clearance issues. | 22th Sep 1921 | Box 47 \ 1 Scan049 | |
| Prince Koudacheff's car, detailing a potential fan pulley issue and the owner's great satisfaction. | 22th Sep 1921 | Box 47 \ 1 Scan050 | |
| Arrangements to test chassis 18-AG with its owner, Mr. Hetherington, and a planned trip to Derby. | 22th Sep 1921 | Box 47 \ 1 Scan051 | |
| Conditional £25 charge for fitting shock absorbers to Chassis No. 46-RE and arranging a test. | 23th Sep 1921 | Box 47 \ 1 Scan052 | |
| Circulating a copy of a customer's letter regarding claims made for his car after fitting a Bosch Plug and Magneto. | 7th Oct 1921 | Box 47 \ 1 Scan053 | |
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