| Description | Date | Identifier | |
| Letter from Mead McLean & Co Ltd sending cardboard templates for ventilator glasses. | 11th Aug 1938 | Box 158 \ 6 scan0020 | |
| Letter to a supplier reporting the failure of a brass hinge pin and requesting a stronger replacement made of steel. | 12th Aug 1938 | Box 158 \ 6 scan0021 | |
| Letter to Messrs. Mead Mclean & Co. Ltd. regarding templates for ventilators and window blueprints. | 13th Aug 1938 | Box 158 \ 6 scan0022 | |
| Letter from Mead McLean & Co. Ltd regarding a change in material from brass to steel for ventilator hinge pins. | 15th Aug 1938 | Box 158 \ 6 scan0023 | |
| Letter from Mead McLean & Co Ltd regarding the supply and templates for 'M.M.' Draughtless Ventilators. | 15th Aug 1938 | Box 158 \ 6 scan0024 | |
| Letter from Mead McLean & Co Ltd regarding cardboard templates for draughtless ventilators. | 18th Aug 1938 | Box 158 \ 6 scan0025 | |
| Letter regarding the replacement of brass hinge pins with steel pins for draughtless ventilators. | 18th Aug 1938 | Box 158 \ 6 scan0026 | |
| Letter from Mead McLean & Co Ltd concerning the results of their 'M.M.' Patent Draughtless Ventilator and proposing its future use. | 27th Aug 1938 | Box 158 \ 6 scan0027 | |
| Letter from the Experimental Department regarding the despatch of window glass sets cut to pattern. | 30th Aug 1938 | Box 158 \ 6 scan0028 | |
| Despatch note for 8 pairs of glass for experimental car window ventilators. | 30th Aug 1938 | Box 158 \ 6 scan0029 | |
| Follow-up letter from Mead McLean & Co Ltd regarding a patented draughtless ventilator for motor cars. | 7th Sep 1938 | Box 158 \ 6 scan0030 | |
| Letter regarding test results and proposed adoption of the 'M.M.' Patent Draughtless Ventilator. | 27th Aug 1938 | Box 158 \ 6 scan0031 | |
| Letter to a supplier regarding issues and suggested modifications for draughtless ventilators. | 17th Sep 1938 | Box 158 \ 6 scan0032 | |
| Letter from Mead McLean & Co discussing the fitting, testing, and modification of their patent draughtless ventilator for motor cars. | 19th Sep 1938 | Box 158 \ 6 scan0033 | |
| Page 2 of a letter regarding the efficient ventilation of motor cars. | 3rd Oct 1938 | Box 158 \ 6 scan0034 | |
| Letter to a supplier regarding the installation of ventilators into experimental car bodies by a coachbuilder. | 3rd Oct 1938 | Box 158 \ 6 scan0035 | |
| Letter from Mead McLean & Co. Ltd concerning the supply and fitting of patent draughtless ventilators. | 4th Oct 1938 | Box 158 \ 6 scan0036 | |
| Letter to Messrs. Mead McLean & Co. Ltd. requesting two replacement wooden mouldings for ventilators. | 19th Oct 1938 | Box 158 \ 6 scan0037 | |
| Letter from Mead McLean & Co Ltd confirming the despatch of two wooden diffuser strips. | 20th Oct 1938 | Box 158 \ 6 scan0038 | |
| Letter concerning the delivery of a set of ventilators and coordinating a meeting to fit them to a chassis. | 24th Oct 1938 | Box 158 \ 6 scan0039 | |
| Letter to Messrs. Mead McLean & Co. Ltd. proposing a meeting in Derby when the body is mounted. | 27th Oct 1938 | Box 158 \ 6 scan0040 | |
| Letter from Mead McLean & Co Ltd regarding arranging a meeting in Derby once a car body from Messrs. Park, Ward & Co. is mounted. | 28th Oct 1938 | Box 158 \ 6 scan0041 | |
| Two invoices from Mead, McLean & Co. Ltd. for 'MM' Patent Draughtless Ventilators. | 1st Nov 1938 | Box 158 \ 6 scan0042 | |
| Payment to Messrs. Mead McLean & Co. for draughtless ventilators. | 4th Nov 1938 | Box 158 \ 6 scan0043 | |
| Letter forwarding a positive customer testimonial from Malaya regarding patent draughtless ventilators for motor cars. | 23th Nov 1938 | Box 158 \ 6 scan0044 | |
| Page 2 of a letter from Mead Mclean & Co. Ltd containing customer testimonials for the 'M.M.' Ventilator. | 5th Jan 1939 | Box 158 \ 6 scan0045 | |
| Unsuitability of the Mead & McLean Ventilators due to wind noise and water ingress, recommending the Fisher type instead. | 5th Jan 1939 | Box 158 \ 6 scan0046 | |
| Letter instructing Messrs. Park Ward & Co. Ltd. to equip all cars with Mead McLean ventilators, attaching a relevant report. | 13th Jan 1939 | Box 158 \ 6 scan0047 | |
| Letter arranging a demonstration of draughtless ventilators to prove they are free from wind noise at high speeds. | 20th Jan 1939 | Box 158 \ 6 scan0048 | |
| Letter from Mead McLean & Co Ltd regarding wind noise testing of their patent draughtless ventilators. | 30th Jan 1939 | Box 158 \ 6 scan0049 | |
| Letter from the Experimental Department regarding wind noise tests on Ford and Wolseley cars. | 1st Feb 1939 | Box 158 \ 6 scan0050 | |
| Letter from the Experimental Department detailing the results of comparative wind noise tests on Ford and Wolseley cars. | 2nd Feb 1939 | Box 158 \ 6 scan0051 | |
| Letter from Mead McLean & Co discussing ventilator wind noise tests and proposals for a new headlamp. | 9th Feb 1939 | Box 158 \ 6 scan0052 | |
| Letter from Mead McLean & Co Ltd proposing a meeting to discuss tests of their Draughtless Ventilator and Daylight Head Lamp. | 23th Feb 1939 | Box 158 \ 6 scan0053 | |
| Letter to Mead McLean & Co. Ltd. regarding a delay in testing the Draughtless ventilator. | 28th Feb 1939 | Box 158 \ 6 scan0054 | |
| Letter to Borg & Beck Co. Ltd. regarding a steel sample for the Phantom III clutch plate, noting an increase in stiffness and requesting a test plate. | 30th Sep 1937 | Box 158 \ 6 scan0055 | |
| Special Dunlop wheels with a loose rim for a chassis intended for America, noting a design fault. | 15th May 1919 | Box 159 \ 1 scan0001 | |
| Two experimental Dunlop wheels, one with improved spoke wiring and the other a new disc wheel, left for inspection. | 6th Jun 1919 | Box 159 \ 1 scan0002 | |
| The unsuitability of a Dunlop Disc Wheel for Mr. Royce's inspection. | 10th Jun 1919 | Box 159 \ 1 scan0003 | |
| The incorrect positioning of the tyre valve on Dunlop wire wheels and a proposed experimental solution. | 18th Sep 1919 | Box 159 \ 1 scan0004 | |
| Clarifying that new and experimental work, such as a request for a detachable wheel, should be handled by Mr. Day. | 22th May 1919 | Box 159 \ 1 scan0005 | |
| Notes from a meeting discussing the testing of Goodyear split rims and straight-sided tyres. | 24th Oct 1919 | Box 159 \ 1 scan0006 | |
| Testing Dunlop wheels with Goodyear demountable rims, including a weight comparison against standard wheels. | 13th Nov 1919 | Box 159 \ 1 scan0007 | |
| Confirming the delivery of Warland rims and Dunlop wheels for testing. | 22th May 1919 | Box 159 \ 1 scan0008 | |
| The dispatch of rims to Dunlop for wheel assembly and a request to expedite delivery. | 9th Feb 1920 | Box 159 \ 1 scan0009 | |
| To Mr. Hives regarding a delay in dispatching rims to the Dunlop Rubber Co Ltd and arranging a lorry for collection. | 10th Feb 1920 | Box 159 \ 1 scan0010 | |
| Dunlop Wire Wheels and a change in the company's name and address. | 21th Feb 1920 | Box 159 \ 1 scan0011 | |
| Letter from The Dunlop Rim & Wheel Co. requesting front and rear axle loads and tyre sizes for their wheel tests. | 20th Feb 1920 | Box 159 \ 1 scan0012 | |
| To Mr. Hives regarding the return of wheels from the Dunlop Rubber Co Ltd., detailing quantities, types, and one scrapped rim. | 24th Feb 1920 | Box 159 \ 1 scan0013 | |
| Proposed additions to a trials car for the American market. | 24th Mar 1920 | Box 159 \ 1 scan0014 | |
| Recommendation to purchase Goodyear tyres and rims due to satisfactory prior experience. | 15th Mar 1920 | Box 159 \ 1 scan0015 | |
| Fitting Dunlop wheels with demountable rims and the need to source straight sided or wired-on tyres. | 18th Mar 1920 | Box 159 \ 1 scan0016 | |
| Issues with Warland rims and proposing alternatives like Goodyear or Firestone with straight-sided tyres. | 30th Mar 1920 | Box 159 \ 1 scan0017 | |
| Recommendation to fit American-made cars with Goodyear demountable rims for straight sided tyres. | 30th Mar 1920 | Box 159 \ 1 scan0018 | |
| Wire wheels with improved spoking, referencing a letter from the Dunlop Co. | 20th Apr 1920 | Box 159 \ 1 scan0019 | |
| Letter from Dunlop Rubber Co. Ltd. regarding the progress and supply of altered wheels for testing. | 16th Apr 1920 | Box 159 \ 1 scan0020 | |
| Letter to The Dunlop Rim & Wheel Co. Ltd. regarding an experimental set of wire wheels with a new design for spoke ends. | 20th Apr 1920 | Box 159 \ 1 scan0021 | |
| Recommendation regarding the adoption of Dunlop wheels with Goodyear or Firestone rims and the advantages of straight-sided tyres. | 30th Apr 1920 | Box 159 \ 1 scan0022 | |
| Advantages of straight-sided tyres over beaded tyres and the need for a mechanically driven tyre pump. | 30th Apr 1920 | Box 159 \ 1 scan0023 | |
| Extract condemning Michelin disc wheels for lacking demountable rims and recommending the pursuit of alternatives. | 22th May 1919 | Box 159 \ 1 scan0024 | |
| Query regarding a discrepancy in the number of Goodyear Demountable Rims supplied by Dunlop Rubber Co. | 11th May 1920 | Box 159 \ 1 scan0025 | |
| Supply of straight-sided tyres and rims from Goodyear Tyre & Rubber Co. and related experiments. | 21th May 1920 | Box 159 \ 1 scan0026 | |
| Fitting of demountable rims, straight-sided tyres, and mechanical tyre pumps. | 17th May 1920 | Box 159 \ 1 scan0027 | |
| Comparison and criticism of Firestone, Stanwell, and Goodyear demountable rims for straight-sided tyres. | 19th May 1920 | Box 159 \ 1 scan0028 | |
| Report comparing the safety of Stanwell, Goodyear, and Firestone wheel rims during high-speed tests with a deflated tyre. | 19th May 1920 | Box 159 \ 1 scan0029 | |
| Advantages of Goodyear rims over Firestone for future chassis standardization. | 19th May 1920 | Box 159 \ 1 scan0030 | |
| Discussion with the Dunlop Company regarding an improved method of spoking wheels to eliminate spoke bend. | 28th May 1920 | Box 159 \ 1 scan0031 | |
| The re-testing of Dunlop straight-sided tyres and loose flange wheels for a chassis rear axle. | 7th Jun 1920 | Box 159 \ 1 scan0032 | |
| Letter from Dunlop Rubber Co. Ltd. outlining the conditions for testing their Straight Side Tyres on a Rolls-Royce test car. | 4th Jun 1920 | Box 159 \ 1 scan0033 | |
| Letter from Dunlop Rubber Co. Ltd. outlining the procedures and conditions for tyre testing. | 9th Jun 1920 | Box 159 \ 1 scan0034 | |
| Proposal to introduce a new type of wire wheel for straight-sided tyres as part of the postwar programme. | 9th Jun 1920 | Box 159 \ 1 scan0035 | |
| List of experimental parts fitted to the 6.EX Car in response to a telegram. | 28th Jun 1920 | Box 159 \ 1 scan0036 | |
| Letter to the Dunlop Rim & Wheel Co. regarding potential fatigue failure in Goodyear type rims due to sharp corners. | 15th Jul 1920 | Box 159 \ 1 scan0037 | |
| Technical letter discussing the design of a Goodyear-type groove, involving a sharp corner. | 15th Jul 1920 | Box 159 \ 1 scan0038 | |
| Internal memorandum discussing the strategy for transitioning from Warland rims to straight sided tyres and loose flanged wheels. | 15th Jul 1920 | Box 159 \ 1 scan0039 | |
| Post-war wheel supply strategy, including wire wheels, Michelin disc wheels, and collaboration with Dunlop. | 15th Jul 1920 | Box 159 \ 1 scan0040 | |
| Wheel and tyre combinations, referencing the Goodyear principle and a previous memo on Michelin disc wheels. | 15th Jul 1920 | Box 159 \ 1 scan0041 | |
| Michelin and Dunlop disc wheels as an alternative for customers who dislike wire wheels. | 21th Jul 1920 | Box 159 \ 1 scan0042 | |
| Bodywork joints, steering mechanisms, wheel wear, and road spring testing. | 22th Jul 1920 | Box 159 \ 1 scan0043 | |
| Addition of a radius to the wheel flange base for straight-sided tyres. | 2nd Aug 1920 | Box 159 \ 1 scan0044 | |
| Performance and removal difficulty of new straight-sided tyres. | 20th Aug 1920 | Box 159 \ 1 scan0045 | |
| The quality and performance of tyres, inner tubes, and detachable rims. | 20th Aug 1920 | Box 159 \ 1 scan0046 | |
| Requesting the testing of a 72-spoke wheel from Dunlop on a bumping rig and service car. | 26th Aug 1920 | Box 159 \ 1 scan0047 | |
| The introduction of Dunlop wire wheels for straight-sided tyres on chassis 1251 onwards. | 2nd Sep 1920 | Box 159 \ 1 scan0048 | |
| Change to straight-sided tyres and wheels, referencing correspondence with the Dunlop Company. | 24th Sep 1920 | Box 159 \ 1 scan0049 | |
| Instructions to continue with Dunlop wheels for the 'N' series and awaiting a decision on standardising straight-sided tyres. | 24th Sep 1920 | Box 159 \ 1 scan0050 | |
| Request to obtain a set of Dunlop wire wheels with demountable rims and straight-sided tyres for testing and approval. | 2nd Oct 1928 | Box 159 \ 1 scan0051 | |
| Request to test Dunlop wire wheels and tyres for resiliency ahead of a standardisation decision. | 2nd Oct 1920 | Box 159 \ 1 scan0052 | |
| Letter in reply to an enquiry about trying Dunlop Wire Wheels with demountable rims on a trials car. | 5th Oct 1920 | Box 159 \ 1 scan0053 | |
| Vehicle springing, wobbles, and tyre performance, with notes on customer complaint strategies and a comparison to American cars. | 7th Oct 1920 | Box 159 \ 1 scan0054 | |
| Various vehicle performance issues for discussion. | 11th Oct 1920 | Box 159 \ 1 scan0055 | |
| Request to obtain a set of Dunlop wheels and six straight-sided tyres for Mr. Royce's car. | 11th Oct 1920 | Box 159 \ 1 scan0056 | |
| Modifications and testing plans for an experimental car destined for the USA. | 4th Nov 1920 | Box 159 \ 1 scan0057 | |
| Decision to continue using the present wheel type for the 'O' series and instructions for ordering parts for the 'P' series. | 17th Nov 1920 | Box 159 \ 1 scan0058 | |
| Comparing the performance of a Dunlop lever against a proprietary lever for Goodyear rims. | 10th Dec 1920 | Box 159 \ 1 scan0059 | |
| Query regarding a complaint from Hoopers coachbuilders about unsatisfactory Dunlop Wire-Wheels with Goodyear Rims. | 1st Jan 1921 | Box 159 \ 1 scan0060 | |
| Correspondence regarding supply and quality issues with Dunlop Wire Wheels and Goodyear Rims. | 3rd Jan 1921 | Box 159 \ 1 scan0061 | |
| The unsatisfactory and dangerous condition of Dunlop wire wheels with Goodyear rims following an inspection. | 4th Jan 1921 | Box 159 \ 1 scan0062 | |
| Letter to Mr. Bleeney concerning a faulty wheel that failed during tyre inflation. | 21th Dec 1920 | Box 159 \ 1 scan0063 | |
| Letter concerning a report on faulty straight-sided wheels, proposing their return for testing and discussing arrangements for replacement. | 22th Dec 1920 | Box 159 \ 1 scan0064 | |
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