| Description | Date | Identifier | |
| Parts list for Section G, detailing components like the undersheet, hubs, servo motor, and brakes. | 14th Apr 1938 | Box 111 \ 2 scan0341 | |
| Specification sheet for the B.50 (First Car) detailing various mechanical sections. | 14th Apr 1938 | Box 111 \ 2 scan0342 | |
| Specification list of vehicle components, part numbers, and assembly notes. | 14th Apr 1938 | Box 111 \ 2 scan0343 | |
| Status report on various automotive components, organized by section number. | 14th Apr 1938 | Box 111 \ 2 scan0344 | |
| Specification sheet detailing changes to propeller shaft, axle, brake, and hub components. | 14th Apr 1938 | Box 111 \ 2 scan0345 | |
| Specification sheet detailing engine and chassis components with their associated drawing numbers. | 14th Apr 1938 | Box 111 \ 2 scan0346 | |
| New blueprints for a wheelcase on a Bentley 50 Chassis. | 20th Apr 1938 | Box 111 \ 2 scan0347 | |
| Specification for the wheels and tyres for the B.50 (First Car). | 1st Apr 1938 | Box 111 \ 2 scan0348 | |
| Notification of new blueprints for Exhaust Manifold drawings for the Bentley 50 Chassis. | 27th Apr 1938 | Box 111 \ 2 scan0349 | |
| New drawings for the Bentley 50 Chassis crankcase and bearings. | 4th May 1938 | Box 111 \ 2 scan0350 | |
| Requesting a time estimate for producing the pattern for the B.50 cast iron engine's crankcase and cylinder block. | 4th May 1938 | Box 111 \ 2 scan0351 | |
| Tests of different body mountings to determine the most suitable type for quietness and steering stability. | 4th May 1939 | Box 111 \ 2 scan0352 | |
| Report comparing 'Metalastik' and 'Rubber insertion' body mountings. | 4th May 1939 | Box 111 \ 2 scan0353 | |
| Report comparing body construction, noise, and design features between car models 1.B.50 and 2.B.50. | 4th May 1939 | Box 111 \ 2 scan0354 | |
| The design for the Bentley 50 Cast Iron Engine's dynamo mounting and oil feed to the distributor drive. | 9th May 1938 | Box 111 \ 2 scan0355 | |
| New blueprints for valves and fittings for the Bentley 50 Chassis. | 18th May 1938 | Box 111 \ 2 scan0356 | |
| Dispatching blueprints for the Bentley 50 cast iron engine, with a handwritten note about a discussion on patterns for an 8-cylinder engine. | 20th May 1938 | Box 111 \ 2 scan0357 | |
| Cylinder components and new drawings for a Bentley 50 Chassis C.I. Engine. | 20th May 1938 | Box 111 \ 2 scan0358 | |
| Request to detail an Experimental Pipe for the B.50 cast iron engine. | 21th May 1938 | Box 111 \ 2 scan0359 | |
| Suggestion to produce a development induction pipe for the B.50 engine to experiment with carburettor arrangements. | 21th May 1938 | Box 111 \ 2 scan0360 | |
| Blueprints for a Bentley 50 engine's crankcase and cylinder head sent to the Pattern Shop. | 21th May 1938 | Box 111 \ 2 scan0361 | |
| Modifications to the Bentley 50 Cast Iron Engine, including the rocker cover and cylinder head. | 24th May 1938 | Box 111 \ 2 scan0362 | |
| Blueprints for a new drawing of a Relief Valve Casing for the Bentley 50 Cast Iron Engine. | 30th May 1938 | Box 111 \ 2 scan0363 | |
| Instructing the use of backed off cams, successful on the Wraith model, for the Bentley 50 C.I. engine. | 31th May 1938 | Box 111 \ 2 scan0364 | |
| New blueprints for Vandervell Camshaft Bearings for the Bentley 50 Cast Iron Engine. | 31th May 1938 | Box 111 \ 2 scan0365 | |
| Instructions for new drawings and experimental machining of a crankshaft for the Bentley 50 Cast Iron Engine. | 3rd Jun 1938 | Box 111 \ 2 scan0366 | |
| New drawings and required parts for the Bentley 50 Cast Iron Engine and Wraith practice. | 8th Jun 1938 | Box 111 \ 2 scan0367 | |
| New drawings and a List of Parts for the oil pump of the Bentley 50 Cast Iron Engine. | 9th Jun 1938 | Box 111 \ 2 scan0368 | |
| Drawings for the B.50 8-cylinder engine, enabling a 6-cylinder crankcase pattern to be made suitable for it. | 9th Jun 1938 | Box 111 \ 2 scan0369 | |
| List of components made from alternative materials for the Bentley 1.B.50 chassis for road testing precautions. | 22th Jun 1938 | Box 111 \ 2 scan0370 | |
| List of parts produced from solid material, categorized by vehicle system. | 22th Jun 1938 | Box 111 \ 2 scan0371 | |
| Annotated photograph of a Bentley chassis identifying various components and their part numbers. | 22th Jun 1938 | Box 111 \ 2 scan0372 | |
| Annotated photograph and parts list for a Bentley Chassis 1-B-50. | 23th Jun 1938 | Box 111 \ 2 scan0373 | |
| Secret memo detailing the status of an experimental car (B.50) and the rebuilding of a gearbox (B.III). | 23th Jun 1938 | Box 111 \ 2 scan0374 | |
| Agreed improvements for the B.50 model to align it with the Silver Wraith, covering suspension, brakes, track width, and bodywork. | 9th Jul 1938 | Box 111 \ 2 scan0375 | |
| List of complaints for car model 1.B.50 following a weekend test run. | 18th Jul 1938 | Box 111 \ 2 scan0376 | |
| Noting that the brake and axle pedals are positioned too closely together. | 18th Jul 1938 | Box 111 \ 2 scan0377 | |
| Outlining the progress and required work for three experimental cars, including the Silver Wraith. | 18th Jul 1938 | Box 111 \ 2 scan0378 | |
| Component specification memo for the 9.B.V., 2.B.50, and 30.G.VI (Silver Wraith) models. | 18th Jul 1938 | Box 111 \ 2 scan0379 | |
| List of design specifications and progress updates for models 2.B.50 and the Silver Wraith (30.G.VI). | 18th Jul 1938 | Box 111 \ 2 scan0380 | |
| List of project status updates for various automotive components. | 18th Jul 1938 | Box 111 \ 2 scan0381 | |
| List of seven faults or issues observed in a vehicle. | 25th Jul 1938 | Box 111 \ 2 scan0382 | |
| List of work and modifications to be carried out on car B.50. | 11th Aug 1938 | Box 111 \ 2 scan0383 | |
| New pistons and pins for the front shock dampers. | 11th Aug 1938 | Box 111 \ 2 scan0384 | |
| Feedback and issues with a car after a 200-mile test drive. | 29th Aug 1938 | Box 111 \ 2 scan0385 | |
| Vehicle faults including ventilation, a leaking roof, and fumes. | 29th Aug 1938 | Box 111 \ 2 scan0386 | |
| List of obsolete and new parts for development work on Bentley Car 1.B.50. | 1st Sep 1938 | Box 111 \ 2 scan0387 | |
| Reporting an unsatisfactory test run on an experimental car due to a missing synchromesh mechanism, requesting a future trial. | 14th Sep 1938 | Box 111 \ 2 scan0388 | |
| Outlining the development program for the B.50 Engine Project, including 6-cylinder and 8-cylinder variants. | 14th Sep 1938 | Box 111 \ 2 scan0389 | |
| List of four different engine unit types, specifying cylinder count and bore size. | 14th Sep 1938 | Box 111 \ 2 scan0390 | |
| Possibility of using a pressed steel plate on project B.50 to save weight, referencing practices by Vauxhall and Ford. | 30th Sep 1938 | Box 111 \ 2 scan0391 | |
| Requesting engine details to enable pattern makers to produce a piston for a B.50, 3.75 bore engine. | 1st Oct 1938 | Box 111 \ 2 scan0392 | |
| Requesting a production cost comparison for the new B.50 engine against the existing Wraith unit. | 1st Oct 1938 | Box 111 \ 2 scan0393 | |
| The production schedule and specifications for experimental cars and engines. | 18th Oct 1938 | Box 111 \ 2 scan0394 | |
| Instructions on engine component manufacturing and testing, specifically regarding camshafts and cast iron engines. | 18th Oct 1938 | Box 111 \ 2 scan0395 | |
| Requesting another opportunity to test drive car B.50 when it is in a fit state. | 26th Oct 1938 | Box 111 \ 2 scan0396 | |
| Deferring the trial of the B.50 vehicle due to the existing prototype being outdated. | 31th Oct 1938 | Box 111 \ 2 scan0397 | |
| From Sg. to Rm. regarding the trial of B.50 and a breach of security protocol. | 31th Oct 1938 | Box 111 \ 2 scan0398 | |
| Specification sheet for car components including the gearbox, rear axle, and brakes. | 3rd Nov 1938 | Box 111 \ 2 scan0399 | |
| List of specifications for rear components, servo, hand brake, and suspension systems. | 3rd Nov 1938 | Box 111 \ 2 scan0400 | |
| List of specifications for various vehicle components including suspension, clutch, and fuel system. | 3rd Nov 1938 | Box 111 \ 2 scan0401 | |
| Specification sheet listing parts for various vehicle systems, including steering, dashboard, cooling, and electrical. | 5th Nov 1938 | Box 111 \ 2 scan0402 | |
| Continued list of electrical equipment components. | 3rd Nov 1938 | Box 111 \ 2 scan0403 | |
| Instructing the removal of an engine from car 29.G.VI and fitting it to a Bentley 1.B.50 chassis. | 22th Nov 1938 | Box 111 \ 2 scan0404 | |
| Bentley 50 experimental car programme and a proposal for a new 'Lagonda Chaser' model. | 3rd Dec 1938 | Box 111 \ 2 scan0405 | |
| Fitting salt-cooled exhaust valves to the Bentley 50 engine, compression ratios, and testing methods. | 12th Dec 1938 | Box 111 \ 2 scan0406 | |
| Instructions for the removal and examination of the engine from Bentley 1.B.50 to find the cause of a rattle. | 4th Jan 1939 | Box 111 \ 2 scan0407 | |
| Introductory memo for a brief outline of the B.V. and B.50 experimental cars, detailing the document's purpose and how it will be updated. | 31th Jan 1939 | Box 111 \ 2 scan0408 | |
| Modifications to a Bentley Outline Specification. | 8th Feb 1939 | Box 111 \ 2 scan0409 | |
| Requesting to fit an all-metal yoke from vehicle 9.B.V. to the near side of vehicle 1.B.50. | 15th Feb 1939 | Box 111 \ 2 scan0410 | |
| List of jobs to be carried out on a Bentley car, 2 B. 50. | 15th Feb 1939 | Box 111 \ 2 scan0411 | |
| List detailing the non-interchangeability of parts for B.V. & B.50 models. | 28th Feb 1939 | Box 111 \ 2 scan0412 | |
| List of vehicle components and major contemplated differences, including gear ratios, petrol tank, rear axle, and dashboard. | 28th Feb 1939 | Box 111 \ 2 scan0413 | |
| The 2.B.50 car, noting issues with the brakes, engine rattle from experimental parts, and steering stability. | 11th Mar 1939 | Box 111 \ 2 scan0414 | |
| Required rectifications for a W.III No.9 unit, including issues with the ignition and cooling systems. | 22th Mar 1939 | Box 111 \ 2 scan0415 | |
| Work instructions for a Bentley Car 2.B.50, including an engine swap and adjustments to suspension and drivetrain. | 22th Mar 1939 | Box 111 \ 2 scan0416 | |
| Near head-on collision and a list of nine criticisms following a vehicle test run. | 3rd Apr 1938 | Box 111 \ 2 scan0417 | |
| Request to improve engine breathing on a Bentley 2.B.50 by fitting a cowling. | 4th Apr 1939 | Box 111 \ 2 scan0418 | |
| Workshop instructions for a Wraith III No.9 unit. | 25th Apr 1939 | Box 111 \ 2 scan0419 | |
| Unsolicited testimonial describing a 200-mile test drive and review of the 2/B/50 model. | 25th Apr 1939 | Box 111 \ 2 scan0420 | |
| Test report on the first B.50 car, comparing its performance and features to a future Wraith model. | 28th Apr 1939 | Box 111 \ 2 scan0421 | |
| Swapping of engines between cars 2.B.50 and 29.G.VI and associated modifications. | 17th May 1939 | Box 111 \ 2 scan0422 | |
| Test report detailing issues found after a 400-mile weekend run, primarily concerning the brake system and other minor faults. | 26th Jun 1939 | Box 111 \ 2 scan0423 | |
| Identifying the source of a whistling sound on B.V. and B.50 models, proposing a modification to the shutter blades. | 20th Jul 1939 | Box 111 \ 2 scan0424 | |
| Front brakes sticking on a car during a cold spell. | 3rd Feb 1940 | Box 111 \ 2 scan0425 | |
| Front Girling brakes sticking when cold and releasing after a short distance. | 3rd Feb 1940 | Box 111 \ 2 scan0426 | |
| Conversion of a car into a transport lorry and the allocation of a new engine. | 13th Mar 1940 | Box 111 \ 2 scan0427 | |
| Letter to Messrs Park Ward & Co. Ltd. regarding the design and costing of a lorry body for chassis 1-B-50. | 28th Mar 1940 | Box 111 \ 2 scan0428 | |
| Specification revision for Bentley V. Unit No. 3, Chassis 2-B-50, regarding the flywheel and clutch. | 29th Oct 1940 | Box 111 \ 2 scan0429 | |
| Revisions to the gearbox and servo motor for Bentley Chassis 2-B-50. | 29th Oct 1940 | Box 111 \ 2 scan0430 | |
| Collecting car B.50-LS, leaving car 10-B.5, and a request to forward a forgotten driving license. | 27th Nov 1940 | Box 111 \ 2 scan0431 | |
| Alternative vehicle arrangements due to the unavailability of Chassis B.50-LS for a planned visit. | 20th Nov 1940 | Box 111 \ 2 scan0432 | |
| 2-B-50 'mongrel car' and arrangements for a future vehicle loan. | 9th Jan 1941 | Box 111 \ 2 scan0433 | |
| Test drive report and impressions of a new car model, focusing on ride, handling, and performance. | 5th Jan 1941 | Box 111 \ 2 scan0434 | |
| Continuation of a road test report detailing the performance and issues with a Bentley II vehicle. | 5th Jan 1941 | Box 111 \ 2 scan0435 | |
| Note on the record mileage achieved by a 3 1/2 Litre Bentley axle shaft before failure, with a theory on the cause of breakages. | 12th Jan 1941 | Box 111 \ 2 scan0436 | |
| Summary of mileage data for various cast iron engine units. | 12th Jan 1941 | Box 111 \ 2 scan0437 | |
| Summary of mileage data for various B.V suspension components. | 12th Jan 1941 | Box 111 \ 2 scan0438 | |
| The settlement of a repair account for car 2.B.50. | 2nd May 1941 | Box 111 \ 2 scan0439 | |
| Faults found in car 2-B-50 during a visit to Leyland. | 26th Jun 1941 | Box 111 \ 2 scan0440 | |
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