| Description | Date | Identifier | |
| Chart of complaints for the 4¼ litre Bentley, tracking faults from January to June 1938. | 30th Jun 1938 | Box 131 \ 2 scan0146 | |
| Invitation to a luncheon regarding a visit and a Depot Complaints Conference. | 11th Apr 1938 | Box 131 \ 2 scan0147 | |
| Brief typed message regarding a complaint conference. | 11th Apr 1938 | Box 131 \ 2 scan0148 | |
| Minutes of a Chassis Complaints Conference meeting. | 12th Apr 1938 | Box 131 \ 2 scan0149 | |
| Worst features of the Phantom III model, covering steering, brake, and clutch issues. | 12th Apr 1938 | Box 131 \ 2 scan0150 | |
| Component issues including flooding carburetters, brake seizures, radiator overheating, and servo squeaks. | 12th Apr 1938 | Box 131 \ 2 scan0151 | |
| List of complaints and proposed solutions for various automotive components. | 12th Apr 1938 | Box 131 \ 2 scan0152 | |
| List of 'Worst Features' for the 25/30 model, including issues and proposed remedies. | 12th Apr 1938 | Box 131 \ 2 scan0153 | |
| Various Bentley vehicle issues including fuel recommendations, modifications, axle rattle, wheel drivers, and engine roughness. | 12th Apr 1938 | Box 131 \ 2 scan0154 | |
| Recommended maximum vehicle speeds, noisy axles, and unreliable clocks and speedometers. | 13th Apr 1938 | Box 131 \ 2 scan0155 | |
| Efficiency and agenda of Depot Conferences and issues with various car models. | 13th Apr 1938 | Box 131 \ 2 scan0156 | |
| Agenda and outcomes of a Chassis Complaint Conference, detailing outstanding issues. | 14th Apr 1938 | Box 131 \ 2 scan0157 | |
| Inspection of the Phantom III crankcase, addressing water leaks and staining. | 20th Apr 1938 | Box 131 \ 2 scan0158 | |
| Juddering Thermoid clutch issue in a Phantom III, chassis 3-AX-173, for the Duke of Portland. | 26th Apr 1938 | Box 131 \ 2 scan0159 | |
| Carburetter issue for a Phantom III vehicle at 200 miles, concerning brass turnings and pump construction. | 26th Apr 1938 | Box 131 \ 2 scan0160 | |
| Investigation into premature cylinder wear on a Bentley 4¼ litre car. | 26th Apr 1938 | Box 131 \ 2 scan0161 | |
| The use of thin oils in Bentley engines and a survey of oils currently in use. | 4th May 1938 | Box 131 \ 2 scan0162 | |
| Fierce clutch and sticking valve rockers on Phantom III, chassis 3-AX-173, for Rt. Hon. Lord Portal. | 4th May 1938 | Box 131 \ 2 scan0163 | |
| Complaints and resolutions for components on the Phantom III and 25/30 HP models. | 4th May 1938 | Box 131 \ 2 scan0164 | |
| Bentley engine roughness and a list of cost-saving service improvements. | 4th May 1938 | Box 131 \ 2 scan0165 | |
| Complaints regarding noise from heavy valves on the Phantom II model, detailing cases and profit. | 4th May 1938 | Box 131 \ 2 scan0166 | |
| The successful testing of rocker cover joints on the Phantom III and requesting further supplies for the Depot. | 4th May 1938 | Box 131 \ 2 scan0167 | |
| Instruction regarding future supplies of Phantom III rocker cover joints made from Vellumoid. | 5th May 1938 | Box 131 \ 2 scan0168 | |
| Test on the use of thin oils on Bentley cars to reduce cylinder bore wear. | 6th May 1938 | Box 131 \ 2 scan0169 | |
| Trial of thin oils on Bentley cars and the potential liability regarding increased cylinder wear. | 9th May 1938 | Box 131 \ 2 scan0170 | |
| Experimental use of thin oils on re-bored Bentley cars to assess cylinder bore wear. | 10th May 1938 | Box 131 \ 2 scan0171 | |
| Visit to the Paris Depot and bringing the Paris Foreman to Derby to investigate and share working methods. | 17th May 1938 | Box 131 \ 2 scan0172 | |
| Noisy rear axle and the return of thrust race GB.2680 for examination. | 17th May 1938 | Box 131 \ 2 scan0173 | |
| Depot methods for dealing with complaints, chiefly concerning engine work on Bentley cars. | 23th May 1938 | Box 131 \ 2 scan0174 | |
| Comparison of engine repair methods and associated labor hours at the Kingsbury, Derby, and Paris depots. | 23th May 1938 | Box 131 \ 2 scan0175 | |
| Analysis of labour hours required for engine decarburation with different modifications. | 23th May 1936 | Box 131 \ 2 scan0176 | |
| Hydraulic dampers returned from Cricklewood to determine if the complaints and subsequent changes were justified. | 27th May 1938 | Box 131 \ 2 scan0177 | |
| Proposal to shorten the Bentley change speed lever based on owner feedback. | 28th May 1938 | Box 131 \ 2 scan0178 | |
| Customer complaint about axle noise and vibration on chassis B.162.LS. | 2nd Jun 1938 | Box 131 \ 2 scan0179 | |
| Cover note for charts detailing complaints about the 4¼ Litre Bentley model. | 8th Jun 1938 | Box 131 \ 2 scan0180 | |
| Line chart tracking the number of complaints for the 4 1/4 Bentley model from January to June 1938. | 30th Jun 1938 | Box 131 \ 2 scan0181 | |
| Line chart plotting the number of complaints for the Bentley 4 1/4 litre model from January to June 1938. | 30th Jun 1938 | Box 131 \ 2 scan0182 | |
| Chart tracking customer complaints for the 4¼ Bentley model for the first six months of 1938. | 1st Jan 1938 | Box 131 \ 2 scan0183 | |
| Line graph charting customer complaints for the 4 1/4 Bentley model in 1938. | 1st Jan 1938 | Box 131 \ 2 scan0184 | |
| Chart tracking the number of complaints for a 4¼ Litre Bentley during 1938. | 30th Jun 1938 | Box 131 \ 2 scan0185 | |
| Chart tracking monthly complaints for the 4¼ Bentley model for the first half of 1938. | 30th Jun 1938 | Box 131 \ 2 scan0186 | |
| Chart tracking the number of customer complaints for a 4 1/4 Litre Bentley in 1938. | 30th Jun 1938 | Box 131 \ 2 scan0187 | |
| Chart tracking complaints for the 4 1/4 litre Bentley engine during 1938. | 1st Jan 1938 | Box 131 \ 2 scan0188 | |
| Chart of complaints for the Bentley 4¼ litre model from July to December 1938. | 1st Jan 1938 | Box 131 \ 2 scan0189 | |
| Chart tracking customer complaints for the Bentley 4 1/4 litre model during 1938. | 1st Jan 1938 | Box 131 \ 2 scan0190 | |
| Chart tracking complaints for a Bentley 4 1/4 litre car during 1938. | 1st Jan 1938 | Box 131 \ 2 scan0191 | |
| Chart of complaints for the 4 1/4 Litre Bentley, showing issues reported between July and December 1938. | 1st Jan 1938 | Box 131 \ 2 scan0192 | |
| Chart of customer complaints for the 4 1/4 Bentley model from July to December 1938. | 1st Jan 1938 | Box 131 \ 2 scan0193 | |
| Chart of complaints for the 4 1/4 Bentley model from July to December 1938. | 10th Jun 1938 | Box 131 \ 2 scan0194 | |
| Loose and rattling baffle from a Bentley B.112.LS front expansion chamber due to insufficient riveting. | 10th Jun 1938 | Box 131 \ 2 scan0195 | |
| Modifications to an exhaust system to reduce booming noise on chassis B.162.LS. | 11th Jun 1938 | Box 131 \ 2 scan0196 | |
| Positions and design of the change speed lever for various Bentley models. | 13th Jun 1938 | Box 131 \ 2 scan0197 | |
| Large number of complaints regarding the 25/30 carburetter. | 15th Jun 1938 | Box 131 \ 2 scan0198 | |
| Query seeking clarification on a chart of complaints for a 4 1/4 Bentley, specifically concerning the clutch. | 15th Jun 1938 | Box 131 \ 2 scan0199 | |
| Carburetter popping due to sticking valves and cooling issues on the 'DL' Series Phantom III. | 15th Jun 1938 | Box 131 \ 2 scan0200 | |
| Dispute over the diagnostic procedure for an engine popping issue on chassis 3-DL-36. | 15th Jun 1938 | Box 131 \ 2 scan0201 | |
| Valve sticking, an inquest, and the loan of a trials car to an owner. | 15th Jun 1938 | Box 131 \ 2 scan0202 | |
| Condition of bronze and white metal bearings on a 3 1/2 Litre car, chassis B.121.AE. | 16th Jun 1938 | Box 131 \ 2 scan0203 | |
| Failure of a Bentley silencer baffle, suggesting an explosion as the cause. | 17th Jun 1938 | Box 131 \ 2 scan0204 | |
| Resolving a popping carburettor issue on a 'D' Series Phantom III and notes on cooling tests. | 20th Jun 1938 | Box 131 \ 2 scan0205 | |
| Investigation into a carburetter popping issue on Chassis 3-DL-36 for Mrs Luck. | 20th Jun 1938 | Box 131 \ 2 scan0206 | |
| Clutch complaints on Bentley vehicles, specifically the issue of 'jagger'. | 20th Jun 1938 | Box 131 \ 2 scan0207 | |
| Hand-drawn graph tracking complaints of clutch jagger against the number of complete units and centre plates changed. | 2nd May 1938 | Box 131 \ 2 scan0208 | |
| Chart of complaints for the 4¼ Bentley model, tracking various issues from January to June 1938. | 2nd May 1938 | Box 131 \ 2 scan0209 | |
| Blueprint chart tracking complaints for the 4 1/4 Bentley model by component from January to June 1938. | 1st Jun 1938 | Box 131 \ 2 scan0210 | |
| Line graph charting the number of complaints for the 4 1/4 Litre Bentley over several months in 1938. | 1st Jun 1938 | Box 131 \ 2 scan0211 | |
| Blueprint detailing the measurements of main bearings for a specific engine unit and chassis. | 28th Sep 1934 | Box 131 \ 2 scan0212 | |
| Line chart tracking various customer complaints for the 4 1/4 Bentley model during 1938. | 1st Jan 1938 | Box 131 \ 2 scan0213 | |
| Chart tracking the number of complaints for a 4 1/4 Litre Bentley from January to June 1938. | 30th Jun 1938 | Box 131 \ 2 scan0214 | |
| Chart of complaints for the 4 1/4 Bentley, tracking faults from January to June 1938. | 30th Jun 1938 | Box 131 \ 2 scan0215 | |
| Line chart tracking the number of complaints for a 4 1/4 Bentley across various categories from January to June 1938. | 1st Jul 1938 | Box 131 \ 2 scan0216 | |
| Customer complaints of the Phantom III clutch not stopping. | 30th Jun 1938 | Box 131 \ 2 scan0217 | |
| Inquiry into potential exhaust valve issues with the Bentley 4-Litre 6-Cylinder engine, referencing Leyland's prior experience. | 5th Jul 1938 | Box 131 \ 2 scan0218 | |
| Information regarding Inlet Side Valve Exhaust for cars produced by the Old Bentley Co. | 8th Jul 1938 | Box 131 \ 2 scan0219 | |
| Specifications and history of exhaust and inlet valves for the Bentley 4-litre 6-cylinder engine. | 6th Jul 1938 | Box 131 \ 2 scan0220 | |
| Cracked cooler casings and arranging for an inspection. | 6th Jul 1938 | Box 131 \ 2 scan0221 | |
| Cover note for charts detailing complaints about the 4¼ Litre Bentley. | 8th Jul 1938 | Box 131 \ 2 scan0222 | |
| Line chart tracking the number of complaints for a 4 1/4 Bentley engine from January to June 1938. | 8th Jul 1938 | Box 131 \ 2 scan0223 | |
| Line chart detailing customer complaints for the 4¼ Bentley model from January to June 1938. | 30th Jun 1938 | Box 131 \ 2 scan0224 | |
| Line chart tracking the number of customer complaints for the 4 1/4 litre Bentley in 1938. | 30th Jun 1938 | Box 131 \ 2 scan0225 | |
| Chart of customer complaints for the 4 1/4 Litre Bentley from January to June 1938. | 30th Jun 1938 | Box 131 \ 2 scan0226 | |
| Line chart tracking various customer complaints for the 4 1/4 Litre Bentley from January to June 1938. | 30th Jun 1938 | Box 131 \ 2 scan0227 | |
| Chart of complaints for the 4 1/4 Bentley, tracking the number of faults per month in 1938. | 30th Jun 1938 | Box 131 \ 2 scan0228 | |
| Chart tracking the number of complaints for the 4 1/4 Bentley model during the first half of 1938. | 1st Jan 1938 | Box 131 \ 2 scan0229 | |
| Request to issue a Depot Sheet for a weaker release valve spring for the Phantom III to reduce the risk of top over-oiling, including test figures. | 8th Jul 1938 | Box 131 \ 2 scan0230 | |
| Complaints and corrective actions for the Phantom III model. | 8th Jul 1938 | Box 131 \ 2 scan0231 | |
| Component issues and modifications, including clutches, speedometers, and 25/30 HP complaints. | 8th Jul 1938 | Box 131 \ 2 scan0232 | |
| List of Bentley complaints and proposed modifications for dynamos, pistons, rear axles, and engine bearings. | 8th Jul 1938 | Box 131 \ 2 scan0233 | |
| Sticking ball drain valves, a remote drain on the Wraith, and relief valve springs for a Phantom III. | 12th Jul 1938 | Box 131 \ 2 scan0234 | |
| Customer complaint of a knock in a Bentley rear axle, found to be caused by two bent driving shafts. | 12th Jul 1938 | Box 131 \ 2 scan0235 | |
| Cover note for instructions on setting Wraith brakes. | 13th Jul 1938 | Box 131 \ 2 scan0236 | |
| Questioning the decision to stop fitting propeller shaft dampers on 4 1/4-litre Bentleys. | 18th Jul 1938 | Box 131 \ 2 scan0237 | |
| Experience of Kingsbury, concluding that the prop shaft damper is of little value in reducing over-run axle noise. | 21th Jul 1938 | Box 131 \ 2 scan0238 | |
| Investigation into a recurrent over-oiling complaint on Chassis 3-DL-2. | 22th Jul 1938 | Box 131 \ 2 scan0239 | |
| Engine diagnostics, detailing oil pressure, oil consumption issues, and component inspections following a test run. | 22th Jul 1938 | Box 131 \ 2 scan0240 | |
| Investigation into an oil leak issue involving valve springs, cotters, and subsequent road tests. | 22th Jul 1938 | Box 131 \ 2 scan0241 | |
| Returned Bentley cylinder block (B.144.HK.) with premature bore wear and plans for further testing. | 5th Aug 1938 | Box 131 \ 2 scan0242 | |
| The despatch and re-purposing of a rebored cylinder block (B.144.HK.). | 5th Aug 1938 | Box 131 \ 2 scan0243 | |
| Causes of over-oiling problems in the Phantom III 'DL' Series engines. | 17th Aug 1938 | Box 131 \ 2 scan0244 | |
| Investigation into steering knock on a Phantom III, caused by a lubrication design fault in the Bakelite contact blocks for the cross steering tubes. | 19th Aug 1938 | Box 131 \ 2 scan0245 | |
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