| Description | Date | Identifier | |
| List of Parts (L.O.P) alteration for the Bentley 5 gearbox tie rod. | 2nd Jun 1939 | Box 99 \ 4 scan0214 | |
| Modifications to the gearbox synchromesh and selector mechanism for trial. | 8th Jun 1939 | Box 99 \ 4 scan0215 | |
| The modifications required for B.V. Gearboxes. | 8th Jun 1939 | Box 99 \ 4 scan0216 | |
| List of points to note during the assembly and testing of a B.V. gearbox. | 10th Jun 1939 | Box 99 \ 4 scan0217 | |
| The procurement of steel caged roller bearings for B.V. gearboxes. | 12th Jun 1939 | Box 99 \ 4 scan0218 | |
| Confirming modifications and re-fitting instructions for B.V. gearboxes. | 17th Jun 1939 | Box 99 \ 4 scan0219 | |
| Instructions for modifying motion shaft components for the first 12 sets of the Bentley V. Chassis. | 21th Jun 1939 | Box 99 \ 4 scan0220 | |
| Interim report on experiments to resolve rattles in the latest type of gearboxes. | 23th Jun 1939 | Box 99 \ 4 scan0221 | |
| Issues with rattles on car 9.B.V. and recommended modifications to the synchromesh cones. | 23th Jun 1939 | Box 99 \ 4 scan0222 | |
| List of parts for the Bentley V. Gearbox, detailing differences between early and later chassis. | 24th Jun 1939 | Box 99 \ 4 scan0223 | |
| List of part numbers for various servo and selector components for different chassis batches. | 24th Jun 1939 | Box 99 \ 4 scan0224 | |
| Cam angles for the B.V. Gearbox, referencing drawings PD.452 and PD.443. | 26th Jun 1939 | Box 99 \ 4 scan0225 | |
| Instructions issued for lightened synchromesh cones for the Bentley V. Gear Box. | 28th Jun 1939 | Box 99 \ 4 scan0226 | |
| Drawing for a 2nd speed gear, noting corrections and potential housing improvements. | 29th Jun 1939 | Box 99 \ 4 scan0227 | |
| Trial and replacement of an anti-rattle device for the B.V. gearbox synchromesh cones. | 29th Jun 1939 | Box 99 \ 4 scan0228 | |
| Urgent request for a 1st speed wheel to continue B.V. gearbox testing. | 17th Jul 1939 | Box 99 \ 4 scan0229 | |
| Confirming the decision to proceed with production of the Bentley V gearbox without the anti-rattle device. | 24th Jul 1939 | Box 99 \ 4 scan0230 | |
| The specifications for B.V. Gearbox No. 12. | 26th Jul 1939 | Box 99 \ 4 scan0231 | |
| Allocation of Bentley V Gear Box No.12 and the unavailability of No.13 due to lack of parts. | 27th Jul 1939 | Box 99 \ 4 scan0232 | |
| Modifications to the Bentley B Gear Box LOPs with corresponding alteration numbers. | 1st Aug 1939 | Box 99 \ 4 scan0233 | |
| Revised 3rd and 4th gear synchromesh design for a B.V. type gearbox. | 24th Nov 1939 | Box 99 \ 4 scan0234 | |
| Use of SZ/NCR material for carbonized parts, referencing Bentley and B.V. gearbox components. | 11th Dec 1939 | Box 99 \ 4 scan0235 | |
| Parts for a revised 3rd & 4th Synchromesh experimental gearbox. | 18th Dec 1939 | Box 99 \ 4 scan0236 | |
| Comparing the weight and size of a Studebaker body against the B.V. body. | 8th Jan 1939 | Box 99 \ 4 scan0237 | |
| Weight comparison of components between an S.B.V. and a Studebaker model. | 28th Dec 1939 | Box 99 \ 4 scan0238 | |
| Request to alter the bore diameter of an Operating Fork for a Bentley V gearbox. | 8th Feb 1940 | Box 99 \ 4 scan0239 | |
| Solutions for a rattle in the transmission of a car, involving potential gearbox replacement and modifications. | 15th Sep 1940 | Box 99 \ 4 scan0240 | |
| List of new and replaced parts for anti-rattle components on 2nd, 3rd, and 4th speed cones. | 15th Sep 1940 | Box 99 \ 4 scan0241 | |
| Blueprints for proposed tri-metal bushes for a layshaft, produced for Messrs. Vandervell Ltd. | 3rd Oct 1940 | Box 99 \ 4 scan0242 | |
| Gearbox rattle issues in Bentley V cars and proposed solutions. | 24th Nov 1940 | Box 99 \ 4 scan0243 | |
| Link between drive shaft flexibility, transmission noise, and clutch engagement on the Phantom III model. | 24th Nov 1940 | Box 99 \ 4 scan0244 | |
| Weight analysis comparing the B.III and B.V. overdrive gearboxes. | 30th Dec 1940 | Box 99 \ 4 scan0245 | |
| List of gearbox spare parts in stock with part numbers and quantities. | 22th Nov 1940 | Box 99 \ 4 scan0246 | |
| Parts list with columns for part number, description, and quantity ('No. Off'). | 22th Nov 1940 | Box 99 \ 4 scan0247 | |
| List of unfinished gearbox spare parts in stock at Slack Lane. | 22th Nov 1940 | Box 99 \ 4 scan0248 | |
| Gearbox failures in B:V cars and a strategy for managing spare parts and vehicle allocation. | 27th Jan 1941 | Box 99 \ 4 scan0249 | |
| Acknowledgement of receipt for a change speed mechanism, gate, lever and stop lamp switch. | 11th Mar 1941 | Box 99 \ 4 scan0250 | |
| Photograph showing a failed first-speed driving gear from a gearbox. | 19th Mar 1941 | Box 99 \ 4 scan0251 | |
| Photograph of a gearbox reverse pinion with associated chassis, gearbox, and mileage details. | 19th Mar 1941 | Box 99 \ 4 scan0252 | |
| Photograph of a 2nd speed driven gear from a gearbox, with associated mileage. | 19th Mar 1941 | Box 99 \ 4 scan0253 | |
| Photograph of a gearbox 2nd motion shaft with its identification label. | 19th Mar 1941 | Box 99 \ 4 scan0254 | |
| Photograph and details of a 1st speed driven gear from a gearbox. | 19th Mar 1941 | Box 99 \ 4 scan0255 | |
| Photograph showing a 1st speed driven gear with its associated chassis, gearbox, and mileage information. | 19th Mar 1941 | Box 99 \ 4 scan0256 | |
| Photograph and failure report for a 3rd and 4th sliding piece from a specific chassis. | 19th Mar 1941 | Box 99 \ 4 scan0257 | |
| Record card for a 1st speed driven gear, noting details of corrected gears and mileage. | 19th Mar 1941 | Box 99 \ 4 scan0258 | |
| Photograph and details of a failed 2nd motion shaft from a gearbox. | 19th Mar 1941 | Box 99 \ 4 scan0259 | |
| Gearbox failure involving the 1st speed driven gear and 2nd speed driving dogs, with a photo of the corrected gear. | 19th Mar 1941 | Box 99 \ 4 scan0260 | |
| Photograph and details of a 1st speed driving gear with a suspected crack and signs of picking up. | 19th Mar 1941 | Box 99 \ 4 scan0261 | |
| Photographs of failed parts from six different B.V. gearboxes. | 10th Apr 1941 | Box 99 \ 4 scan0262 | |
| Cover memo for photographs of parts that have failed on six different B.V. gearboxes. | 19th Apr 1941 | Box 99 \ 4 scan0263 | |
| Covering memo regarding the Bentley V Conversion gearbox, forwarding other related memos. | 31th Mar 1941 | Box 99 \ 4 scan0264 | |
| Letter to Vandervell Products Ltd. regarding a trial of gearbox layshaft bushes and enclosing prints. | 25th Aug 1941 | Box 99 \ 4 scan0265 | |
| Recording the fitting of gearbox S.R.1 to Bentley Chassis 8.B.V., replacing gearbox S.R.2. | 19th Jan 1943 | Box 99 \ 4 scan0266 | |
| Confirming assembly instructions for B.V. Gear Box No. 11. | 26th Jun 1939 | Box 99 \ 4 scan0267 | |
| Modifications for Gearbox No. 11, to be fitted to 12.B.V. for a French test. | 30th Jun 1939 | Box 99 \ 4 scan0268 | |
| Production of layshaft clusters for the B.V. Gearbox. | 7th Jul 1939 | Box 99 \ 4 scan0269 | |
| Scheme for temporarily applying Timken bearings to an existing Layshaft in a B.V. gear box. | 29th Jun 1939 | Box 99 \ 4 scan0270 | |
| Gearbox rattles in Bentley V cars, comparing production models with experimental cars and proposing axle or gearbox design changes. | 24th Nov 1940 | Box 99 \ 4 scan0271 | |
| Relationship between drive shaft flexibility, transmission noise, and clutch engagement on the Phantom III model. | 24th Nov 1940 | Box 99 \ 4 scan0272 | |
| Secret memo discussing the demonstration, testing, and durability of the B.V. gearbox. | 7th Jun 1939 | Box 99 \ 4 scan0273 | |
| Dynamometer testing results for the B.V. and Wraith gearboxes. | 8th Jun 1939 | Box 99 \ 4 scan0274 | |
| Dynamometer and road test results for a Wraith vehicle, including failures and mileage. | 8th Jun 1939 | Box 99 \ 4 scan0275 | |
| Comparison of testing mileage between the B.V. and Wraith models ahead of the Motor Show. | 8th Jun 1939 | Box 99 \ 4 scan0276 | |
| Experiment on the Wraith gearbox overdrive and the potential elimination of the centre bearing. | 2nd Mar 1939 | Box 99 \ 4 scan0277 | |
| Drawings and required information for gearbox modifications. | 13th Aug 1938 | Box 99 \ 4 scan0278 | |
| Technical memo detailing observations on a universal gearbox fitted to a 7.B.V. model. | 24th Mar 1938 | Box 99 \ 4 scan0279 | |
| Application of overdrive gearboxes to P.III, Bentley, and Wraith models. | 28th May 1937 | Box 99 \ 4 scan0280 | |
| From Sg. to Rm. regarding the application of overdrive to the B.III and Continental Phantom models. | 26th May 1937 | Box 99 \ 4 scan0281 | |
| Technical analysis comparing the Bentley III gearbox and overdrive with its potential application on the Phantom. | 6th May 1937 | Box 99 \ 4 scan0282 | |
| Importance of testing a car with the correct ratios under specific conditions. | 10th Mar 1939 | Box 99 \ 4 scan0283 | |
| Production viability of the B.50 gearbox for the 'M' series Bentley, outlining untested features. | 10th Mar 1939 | Box 99 \ 4 scan0284 | |
| Technical memorandum discussing the testing, durability, and improvements for overdrive boxes, gears, and servo systems. | 10th Mar 1939 | Box 99 \ 4 scan0285 | |
| The testing and development of the B.V. Gearbox, focusing on overcoming noise and gear issues. | 23th May 1939 | Box 99 \ 4 scan0286 | |
| Test report on the Bentley 5 Gear Box with overdrive. | 17th Jun 1939 | Box 99 \ 4 scan0287 | |
| Required gearbox modifications for specific B.V. series cars. | 21th Jun 1939 | Box 99 \ 4 scan0288 | |
| List of modifications for the B.V. Gearboxes for the Corniche cars. | 23th Jun 1939 | Box 99 \ 4 scan0289 | |
| Design change for the Bentley III independent front suspension. | 31th Dec 1936 | Box 100 \ 1 scan0001 | |
| Scheme for the bump and rebound buffers and jack pad for the Bentley III independent front suspension. | 11th Jan 1937 | Box 100 \ 1 scan0002 | |
| The spring suspension mechanism drawings for the Bentley III chassis front wheels. | 18th Jan 1937 | Box 100 \ 1 scan0003 | |
| The design and fitting of the rear spring aft shackle for the Bentley III. | 6th Feb 1937 | Box 100 \ 1 scan0004 | |
| Torsion bar design for the Bentley III suspension, comparing it to the Vauxhall 25-HP model. | 11th Feb 1937 | Box 100 \ 1 scan0005 | |
| The preliminary layout for fitting a Wraith III open coil spring front suspension to a Bentley III, noting the project has been abandoned. | 31th Mar 1937 | Box 100 \ 1 scan0006 | |
| The modifications required to apply the Wraith III front suspension to the Bentley III. | 16th Apr 1937 | Box 100 \ 1 scan0007 | |
| Filing schemes for applying Wraith III front suspension to the Bentley III, an idea which had been dropped. | 22th May 1937 | Box 100 \ 1 scan0008 | |
| Experiments on the rear suspension for the Phoenix and Bentley III models. | 24th May 1937 | Box 100 \ 1 scan0009 | |
| Requesting detailed requirements for rubber bearings for the Packard suspension on a Bentley III. | 11th Jun 1937 | Box 100 \ 1 scan0010 | |
| Secret memo discussing Packard-type front suspension camber and caster adjustments for Bentley III and Phoenix models. | 23th Jun 1937 | Box 100 \ 1 scan0011 | |
| Instructions to ascertain the type of packing piece used in a lower triangle yoke and review a proposed manufacturing scheme. | 24th Jun 1937 | Box 100 \ 1 scan0012 | |
| Lower triangle levers for the Bentley III front suspension, referencing Packard construction. | 24th Jun 1937 | Box 100 \ 1 scan0013 | |
| Design of the yoke piece and bearings for the Bentley III front suspension. | 26th Jun 1937 | Box 100 \ 1 scan0014 | |
| Laboratory analysis report on the chemical composition of Packard front suspension parts. | 30th Jun 1937 | Box 100 \ 1 scan0015 | |
| The design and fabrication of the Bentley III front suspension frame crossmember. | 5th Jul 1937 | Box 100 \ 1 scan0016 | |
| Design of front suspension upper triangle levers and shock damper mounting for the Bentley III. | 5th Jul 1937 | Box 100 \ 1 scan0017 | |
| The design of the Bentley III front suspension lower triangle, rear bearing, and frame gusset. | 9th Jul 1937 | Box 100 \ 1 scan0018 | |
| Use of mild steel for front suspension lever forgings on the B.III model. | 9th Jul 1937 | Box 100 \ 1 scan0019 | |
| Cost comparison of different steel types for forging Bentley III components. | 9th Jul 1937 | Box 100 \ 1 scan0020 | |
| Quotation for 1,500 Torque Arms and the associated part cost of tools. | 12th Jul 1937 | Box 100 \ 1 scan0021 | |
| The design of rear springs and anchorages for the Bentley III model, referencing drawings LeC:-5782 and LeC:-5783. | 14th Jul 1937 | Box 100 \ 1 scan0022 | |
| Confirming a verbal order for 6 Bentley III front suspension torque arms and the despatch of steel inserts. | 15th Jul 1937 | Box 100 \ 1 scan0023 | |
| Letter to The Projectile & Engineering Co. Ltd. regarding the production of sample torque arms and a cost estimate for frames. | 16th Jul 1937 | Box 100 \ 1 scan0024 | |
| | | | |
