| Description | Date | Identifier | |
| Production and development costs for B.III and B.30 frames from various suppliers. | 11th Apr 1938 | Box 148 \ 5 scan0318 | |
| Cost analysis for inlet valves with figures from Morris Motors, including material specifications and a comparative note on gearbox grinding costs. | 28th Apr 1938 | Box 148 \ 5 scan0319 | |
| Cost implications of gear grinding versus shaving. | 28th Apr 1938 | Box 148 \ 5 scan0320 | |
| Requesting a cost comparison for B.III and B.50 bottom water connections, comparing a rubber hose assembly to a copper pipe alternative. | 26th Apr 1938 | Box 148 \ 5 scan0321 | |
| Requesting a cost analysis for valves, challenging a previously quoted price. | 26th Apr 1938 | Box 148 \ 5 scan0322 | |
| Bentley production, the position on Girling brakes, and avoiding a repeat of the Phantom III experience. | 28th Apr 1938 | Box 148 \ 5 scan0323 | |
| Review of the B.III and B.50 programme, comparing current targets with past development results and timelines. | 27th Apr 1938 | Box 148 \ 5 scan0324 | |
| Progress report on cost savings and development for the P.III, P.II, B.50, B.III, and Wraith models. | 27th Apr 1938 | Box 148 \ 5 scan0325 | |
| Comparative analysis table of prototype development periods, costs, and value. | 27th Apr 1938 | Box 148 \ 5 scan0326 | |
| Critique of the Phantom III policy, discussing its complicated design, high costs, and lengthy development. | 27th Apr 1938 | Box 148 \ 5 scan0327 | |
| Cost analysis for replacing the Bentley III and B.50 bottom water connections with an alternative copper pipe. | 26th Apr 1938 | Box 148 \ 5 scan0328 | |
| Modification to the front axle anchorage, including costs and scope. | 6th May 1938 | Box 148 \ 5 scan0329 | |
| Requesting a works cost comparison for the Wraith radiator mounting. | 11th May 1938 | Box 148 \ 5 scan0330 | |
| Costs and reasons for experimental scrap parts due to design changes and drawing errors. | 13th May 1938 | Box 148 \ 5 scan0331 | |
| Engine production, highlighting part commonality between the Wraith and a new engine, cost reductions, and machining recommendations. | 14th May 1938 | Box 148 \ 5 scan0332 | |
| Cost comparison memo for two different Wraith radiator mounting schemes. | 14th May 1938 | Box 148 \ 5 scan0333 | |
| Request for a factory cost comparison for push rods for Wraith III and Bentley III engine units. | 16th May 1938 | Box 148 \ 5 scan0334 | |
| Request for a comparative factory cost estimate for Wraith & Bentley III parts. | 20th May 1938 | Box 148 \ 5 scan0335 | |
| Cost of forgings and supply chain strategies with other companies. | 25th May 1938 | Box 148 \ 5 scan0336 | |
| Calculation of potential savings based on a 25% reduction in forging costs for various car and engine models. | 27th May 1938 | Box 148 \ 5 scan0337 | |
| Proposal for a replacement Wraith model, detailing modifications, costs, and profitability concerns. | 27th May 1938 | Box 148 \ 5 scan0338 | |
| Contingency plan discussing part reusability on a B.50 car and a comparison with the Wraith chassis. | 27th May 1938 | Box 148 \ 5 scan0339 | |
| Cost estimate and weight calculation for a Bentley '50' Cylinder & Crankcase pattern and coreboxes. | 30th May 1938 | Box 148 \ 5 scan0340 | |
| Private memorandum analysing the cost of forgings for the Wraith shaft. | 30th May 1938 | Box 148 \ 5 scan0341 | |
| Request to cost the modification of shortening the gear lever on Bentley 'M' series cars. | 2nd Jun 1938 | Box 148 \ 5 scan0342 | |
| Comparative costs, requesting photographs of parts be attached to cost sheets for accurate comparison. | 2nd Jun 1938 | Box 148 \ 5 scan0343 | |
| The cost of modifying the short type Change Gear Lever for a Bentley 'M' Series chassis. | 2nd Jun 1938 | Box 148 \ 5 scan0344 | |
| Cost comparison of a Bentley Common Gearbox versus a Rover Gearbox. | 11th Jun 1938 | Box 148 \ 5 scan0345 | |
| Confirming a copy of a document regarding flash-butt welding has been sent. | 13th Jun 1938 | Box 148 \ 5 scan0346 | |
| The reliability of electric flash-butt welding for Bentley III and Bentley 50 models, including test results. | 2nd Mar 1938 | Box 148 \ 5 scan0347 | |
| Suggestion to produce the front crossmember using flash welding instead of pegging and brazing for economic reasons. | 2nd Mar 1938 | Box 148 \ 5 scan0348 | |
| Request for the factory cost of a car heater rheostatic switch. | 14th Jun 1938 | Box 148 \ 5 scan0349 | |
| Requesting cost figures for standard and two alternative experimental Wraith water pumps. | 14th Jun 1938 | Box 148 \ 5 scan0350 | |
| Secret policy document outlining the completion of existing projects and plans for new developments. | 14th Jun 1938 | Box 148 \ 5 scan0351 | |
| Proposed engine redesign modifications for the Phantom III Wraith replacement project. | 14th Jun 1938 | Box 148 \ 5 scan0352 | |
| List of proposed design simplifications and chassis re-design points for a vehicle. | 14th Jun 1938 | Box 148 \ 5 scan0353 | |
| Cost-saving proposal for manufacturing the Rocker Cover Thumb Nut for the Wraith model. | 25th Jun 1938 | Box 148 \ 5 scan0354 | |
| Factory cost estimate for producing a resistance and switch unit for a car heater under scheme DCD.709. | 25th Jun 1938 | Box 148 \ 5 scan0355 | |
| Cost investigation of alternative designs for the Wraith III water pump. | 30th Jun 1938 | Box 148 \ 5 scan0356 | |
| Cost and time analysis comparing oil resisting cellulose paint with linseed oil for sealing aluminium castings. | 1st Jul 1938 | Box 148 \ 5 scan0357 | |
| Cost comparison and saving calculation for engine spraying with Cellulose versus Linseed Oil. | 2nd Jul 1938 | Box 148 \ 5 scan0358 | |
| Proposal for a new chassis nomenclature system covering a range of Bentley and Wraith models and their derivatives. | 2nd Jul 1938 | Box 148 \ 5 scan0359 | |
| Costs and reasons for experimental scrap parts due to design changes and incorrect drawings. | 4th Jul 1938 | Box 148 \ 5 scan0360 | |
| List of scrapped parts with quantities, piece numbers, and reasons for rejection. | 5th Jul 1938 | Box 148 \ 5 scan0361 | |
| Attaching a list of points on various chassis requiring design attention. | 5th Jul 1938 | Box 148 \ 5 scan0362 | |
| List of design issues and suggested modifications for various components of the Wraith model. | 30th Jun 1938 | Box 148 \ 5 scan0363 | |
| List of technical observations and proposed modifications for various vehicle components. | 30th Jun 1938 | Box 148 \ 5 scan0364 | |
| Agreeing to a proposal for chassis nomenclatures. | 7th Jul 1938 | Box 148 \ 5 scan0365 | |
| Request for an estimated cost figure for the B.50 radiator for comparison with outside firms. | 11th Jul 1938 | Box 148 \ 5 scan0366 | |
| List of drawings and pieces applicable to the B.50 Radiator. | 11th Jul 1938 | Box 148 \ 5 scan0367 | |
| Proposal to investigate using pressed sheet metal for pedal gap plates to reduce manufacturing costs. | 11th Jul 1938 | Box 148 \ 5 scan0368 | |
| Cost and operations sheet for manufacturing Pedal Gap Plates for the Phantom III. | 12th Jul 1938 | Box 148 \ 5 scan0369 | |
| Manufacturing operations and cost breakdown for Wraith Pedal Gap Plates. | 12th Jul 1938 | Box 148 \ 5 scan0370 | |
| Manufacturing operations and cost breakdown for a Bentley Pedal Gap Plate, part number FB.3204. | 12th Jul 1938 | Box 148 \ 5 scan0371 | |
| Meeting notes discussing production costs for the Wraith chassis and B.50 gearbox. | 12th Jul 1938 | Box 148 \ 5 scan0372 | |
| Secret memorandum detailing known faults and proposed modifications for the Wraith model. | 15th Jul 1938 | Box 148 \ 5 scan0373 | |
| Schedule for fitting new linkage and dynamo drive parts to experimental and production cars, requesting a cost analysis. | 15th Jul 1938 | Box 148 \ 5 scan0374 | |
| Suggesting the use of pressed steel pedal gap plates and their standardization across car models. | 16th Jul 1938 | Box 148 \ 5 scan0375 | |
| Secret memo regarding specifications for three experimental cars, including the Silver Wraith. | 18th Jul 1938 | Box 148 \ 5 scan0376 | |
| Secret memorandum detailing particulars for car models 9.B.V, 2.B.50 and 30.G.VI (Silver Wraith). | 18th Jul 1938 | Box 148 \ 5 scan0377 | |
| List of design specifications and status updates for car models 2.B.50 and 30.G.VI (Silver Wraith). | 18th Jul 1938 | Box 148 \ 5 scan0378 | |
| Status report outlining required design work and progress on various vehicle components. | 18th Jul 1938 | Box 148 \ 5 scan0379 | |
| Investigation into the cost reduction of fabricated, bought-out chassis parts for the Bentley III. | 20th Jul 1938 | Box 148 \ 5 scan0380 | |
| Cost analysis of engine valves and ferrous forgings for various chassis models. | 20th Jul 1938 | Box 148 \ 5 scan0381 | |
| Cost comparison from various firms for the supply of Semi-Floating Rear Axle Shafts. | 20th Jul 1938 | Box 148 \ 5 scan0382 | |
| Firm selection, material sourcing, and the design and costing of forgings. | 20th Jul 1938 | Box 148 \ 5 scan0383 | |
| Considerations for the design, profitability, quantity, and quality control of forged parts. | 20th Jul 1938 | Box 148 \ 5 scan0384 | |
| Forging quality, and cost savings achieved by redesigning front suspension main levers. | 20th Jul 1938 | Box 148 \ 5 scan0385 | |
| Specification document detailing modifications to the B.50 gear box for different vehicle builds. | 21th Jul 1938 | Box 148 \ 5 scan0386 | |
| List of modifications and notes concerning gearbox components and testing. | 21th Jul 1938 | Box 148 \ 5 scan0387 | |
| The sensitivity of sharing information regarding the lack of profitability on a complicated chassis design. | 4th Aug 1938 | Box 148 \ 5 scan0388 | |
| Request for comparative photographs of car components to justify the high cost of their cars. | 26th Jul 1938 | Box 148 \ 5 scan0389 | |
| Chassis complexity, component simplification, and cost reduction efforts across different models. | 28th Jul 1938 | Box 148 \ 5 scan0390 | |
| Comparative manufacturing costs, design simplification, and production rationalization for Bentley and Wraith models against competitors. | 28th Jul 1938 | Box 148 \ 5 scan0391 | |
| Cost and time breakdown sheet for vehicle components. | 20th Jul 1938 | Box 148 \ 5 scan0392 | |
| Cost and labor time analysis table for various vehicle components and sections. | 20th Jul 1938 | Box 148 \ 5 scan0393 | |
| Manufacturing cost and time breakdown for various vehicle components. | 20th Jul 1938 | Box 148 \ 5 scan0394 | |
| Costings sheet detailing labor hours and material costs for various automotive parts and assemblies. | 20th Jul 1938 | Box 148 \ 5 scan0395 | |
| Comparative cost and labour analysis between the Bentley 50 and Wraith models. | 20th Jul 1938 | Box 148 \ 5 scan0396 | |
| Estimated factory costings for the Bentley 50 chassis at production rates of 10 and 20 per week. | 9th Aug 1938 | Box 148 \ 5 scan0397 | |
| Obtaining outside quotations for die-cast production for the Wraith model. | 9th Aug 1938 | Box 148 \ 5 scan0398 | |
| Cost comparison between die casting and sand casting for the Wraith III gearbox, part number GW.1890. | 3rd Aug 1938 | Box 148 \ 5 scan0399 | |
| Cost analysis document for Gear Box Part No. GW.1890, detailing the recuperation of tool charges. | 3rd Aug 1938 | Box 148 \ 5 scan0400 | |
| Cost comparison analysis for a Rear Axle Housing, contrasting die casting and sand casting methods. | 3rd Aug 1938 | Box 148 \ 5 scan0401 | |
| Cost comparison between die casting and sand casting for a lower half crankcase. | 3rd Aug 1938 | Box 148 \ 5 scan0402 | |
| Cost comparison analysis between die casting and sand casting for a crankcase top half, including labour, materials, and tool charges. | 13th Aug 1938 | Box 148 \ 5 scan0403 | |
| Secret memo analysing the cost of quantity-produced Park Ward car bodies. | 13th Aug 1938 | Box 148 \ 5 scan0404 | |
| Cost analysis table for different types of body shells based on batch size. | 13th Aug 1938 | Box 148 \ 5 scan0405 | |
| Cost analysis and comparison of vehicle body shell production, labour, and tooling for various models. | 13th Aug 1938 | Box 148 \ 5 scan0406 | |
| Viability of contracting Park Ward to build the B.50 car body. | 13th Aug 1938 | Box 148 \ 5 scan0407 | |
| Cost analysis document detailing material and labour expenses for different components. | 13th Aug 1938 | Box 148 \ 5 scan0408 | |
| Proposal to standardize a new, cheaper all-steel gearbox dipstick design for all chassis, replacing the existing costly version. | 16th Aug 1938 | Box 148 \ 5 scan0409 | |
| Proposal to modify the Synchro-mesh units for the Wraith & Phantom III models to reduce machining costs. | 16th Aug 1938 | Box 148 \ 5 scan0410 | |
| Design and cost of a new gearbox dipstick. | 18th Aug 1938 | Box 148 \ 5 scan0411 | |
| Wear on a Minx synchromesh unit and proposing to test a similar design on a Wraith gearbox. | 18th Aug 1938 | Box 148 \ 5 scan0412 | |
| Secret general development progress report on new experimental cars and the Wraith replacement. | 18th Aug 1938 | Box 148 \ 5 scan0413 | |
| The development and troubleshooting of existing experimental cars, focusing on the Wraith and B.III models. | 18th Aug 1938 | Box 148 \ 5 scan0414 | |
| Progress report on engine development, foreign car evaluation, and general research programs. | 18th Aug 1938 | Box 148 \ 5 scan0415 | |
| List of ongoing investigations and tests on various automotive components and systems. | 18th Aug 1938 | Box 148 \ 5 scan0416 | |
| Progress report on various vehicle development projects, including wireless, heating, tyres, and engine components. | 18th Aug 1938 | Box 148 \ 5 scan0417 | |
| | | | |
