| Description | Date | Identifier | |
| Test report on Dunlop straight-sided tyres for the week ending 3rd October. | 3rd Oct 1920 | Box 45 \ 1 Scan107 | |
| Letter from Dunlop Rubber Co. requesting a test car for tyre refitting. | 1st Oct 1920 | Box 45 \ 1 Scan108 | |
| Letter from Dunlop regarding the correct fitting and direction of rotation for special herring-bone pattern tyres on a test car. | 6th Oct 1920 | Box 45 \ 1 Scan109 | |
| Correspondence regarding the supply and delivery of Dunlop detachable wire wheels and tyres. | 6th Oct 1920 | Box 45 \ 1 Scan110 | |
| Letter to Dunlop Rubber Co. enquiring about the correct directional fitting of tyre treads. | 6th Oct 1920 | Box 45 \ 1 Scan111 | |
| Report extract discussing vehicle springing issues, shock absorbers, and customer handling strategy in the US market. | 7th Oct 1920 | Box 45 \ 1 Scan112 | |
| List of numbered vehicle faults and observations for discussion. | 7th Oct 1920 | Box 45 \ 1 Scan113 | |
| Notification of a revised price list for 1921 Dunlop Pneumatic Motor Tyres, including new Straight Sided Tyres. | 7th Oct 1920 | Box 45 \ 1 Scan114 | |
| Request to ask Messrs. Dunlops to dispatch six wire wheels and six straight-sided tyres and tubes to Conduit Street. | 10th Oct 1920 | Box 45 \ 1 Scan115 | |
| Noise issues with new Dunlop straight-sided tyres and a request for testing. | 11th Oct 1920 | Box 45 \ 1 Scan116 | |
| Letter to Dunlop complaining about the noise from their new straight-sided tyres. | 11th Oct 1920 | Box 45 \ 1 Scan117 | |
| Continued document comparing the noise of new Dunlop straight-sided tyres to American tyres. | 29th Oct 1921 | Box 45 \ 1 Scan118 | |
| Letter expressing concern that new Dunlop tyres for a demonstration car will be noisier than the current set. | 12th Oct 1920 | Box 45 \ 1 Scan119 | |
| Letter to The Dunlop Rubber Co. regarding a report on a new set of tyres for the attention of Mr. W. Bond. | 21th Oct 1920 | Box 45 \ 1 Scan120 | |
| Test log for Dunlop straight-side tyres, tracking mileage, routes, and performance. | 7th Oct 1920 | Box 45 \ 1 Scan121 | |
| Log of tyre performance detailing mileage, routes taken, and driving conditions. | 17th Oct 1920 | Box 45 \ 1 Scan122 | |
| Letter from Dunlop regarding mileage and noise issues on an experimental set of tyres. | 25th Oct 1920 | Box 45 \ 1 Scan123 | |
| Letter from Dunlop requesting to examine an experimental car due to a noise issue with the tyres. | 26th Oct 1920 | Box 45 \ 1 Scan124 | |
| Letter to Dunlop Rubber Co. Ltd. regarding the testing of their tyres on an experimental car. | 27th Oct 1920 | Box 45 \ 1 Scan125 | |
| Test log for Dunlop straight-sided tyres, recording mileage and performance remarks. | 24th Oct 1920 | Box 45 \ 1 Scan126 | |
| Letter from Dunlop Rubber Co Ltd concerning an experimental car and tyre noise. | 28th Oct 1920 | Box 45 \ 1 Scan127 | |
| Arranging the return of noisy Dunlop straight-sided tyres from a Trials Car. | 29th Oct 1920 | Box 45 \ 1 Scan128 | |
| Copy of a letter from The Dunlop Rubber Co. to Rolls-Royce regarding an experimental car, noise, and tyre mileage. | 28th Oct 1920 | Box 45 \ 1 Scan129 | |
| Noise complaints about Dunlop straight-sided tyres and arranging for their return. | 29th Oct 1920 | Box 45 \ 1 Scan130 | |
| Results of tyre trials on an Open Trials Car, focusing on noise and comfort. | 28th Oct 1920 | Box 45 \ 1 Scan131 | |
| Letter from Dunlop requesting an experimental car for tyre noise testing. | 1st Nov 1920 | Box 45 \ 1 Scan132 | |
| Letter from Dunlop Rubber Co. Ltd cancelling a visit regarding tyres for an experimental car, asking for the car to be sent to them instead. | 1st Nov 1920 | Box 45 \ 1 Scan133 | |
| Letter to the Dunlop Rubber Company regarding weekly tyre mileage and a change of vehicle body type. | 3rd Nov 1920 | Box 45 \ 1 Scan134 | |
| Test report log for Dunlop straight-sided tyres, noting mileage, routes, and vehicle status. | 28th Oct 1920 | Box 45 \ 1 Scan135 | |
| Circular from Dunlop Rubber Co. Ltd. regarding the production of new tyres, a detected noise issue, and a proposed meeting. | 5th Nov 1920 | Box 45 \ 1 Scan136 | |
| Letter from Dunlop regarding unsatisfactory noise from modified Straight Side Tyres on an experimental car. | 10th Nov 1920 | Box 45 \ 1 Scan137 | |
| Letter to Dunlop providing feedback on the noise levels of various tyres after road testing. | 10th Nov 1920 | Box 45 \ 1 Scan138 | |
| Letter from Dunlop Rubber Co Ltd. regarding the comparative noise of tyres under trial. | 12th Nov 1920 | Box 45 \ 1 Scan139 | |
| Letter to Dunlop Rubber Co. Ltd. regarding a report on tyre mileage and the fitting of new tyres. | 17th Nov 1920 | Box 45 \ 1 Scan140 | |
| Test log sheet for Dunlop straight-sided tyres, recording mileage and usage. | 3rd Nov 1920 | Box 45 \ 1 Scan141 | |
| Log sheet detailing daily tyre usage, mileage, and journey information. | 16th Nov 1920 | Box 45 \ 1 Scan142 | |
| The type of wheels to be ordered for the 'O' Series chassis, continuing with the current type. | 17th Nov 1920 | Box 45 \ 1 Scan143 | |
| Letter to Dunlop Rubber Co. Ltd. complaining about excessive noise from new tyres after a 400-mile test run. | 22th Nov 1920 | Box 45 \ 1 Scan144 | |
| Offer for a practical demonstration drive of a car in Birmingham. | 12th Sep 1926 | Box 45 \ 1 Scan145 | |
| Letter to Dunlop Rubber Co. Ltd. regarding tests on the silence and non-skidding qualities of their straight-sided tyres. | 23th Nov 1920 | Box 45 \ 1 Scan146 | |
| Inquiring about what action to take regarding Dunlop straight-sided tyres held by the Sales Department. | 25th Nov 1920 | Box 45 \ 1 Scan147 | |
| Instructions for the disposal of Dunlop straight-sided tyres and wheels. | 24th Nov 1920 | Box 45 \ 1 Scan148 | |
| Noise issues with Dunlop straight-sided tyres and proposing a resolution. | 29th Oct 1920 | Box 45 \ 1 Scan149 | |
| Requesting instructions for the disposal of Dunlop straight-sided tyres and wheels. | 24th Nov 1920 | Box 45 \ 1 Scan150 | |
| Letter from Dunlop Rubber Co Ltd regarding the development and testing of tyres on an experimental car. | 26th Nov 1920 | Box 45 \ 1 Scan151 | |
| Correspondence regarding experimental Dunlop Straight Side Tyres and arranging their return for a credit note. | 27th Nov 1920 | Box 45 \ 1 Scan152 | |
| Instructions for the disposal of Dunlop straight-sided tyres and the retention of wheels for further testing. | 27th Nov 1920 | Box 45 \ 1 Scan153 | |
| Letter to the Dunlop Rubber Co. Ltd. enclosing a report on tyre mileage. | 30th Nov 1920 | Box 45 \ 1 Scan154 | |
| Log of tests performed on Dunlop straight-sided tyres. | 22th Nov 1920 | Box 45 \ 1 Scan155 | |
| Log of tyre mileage and vehicle journeys. | 29th Nov 1920 | Box 45 \ 1 Scan156 | |
| Letter to the Dunlop Rubber Co. Ltd arranging to send a car for tyre selection trials. | 7th Dec 1920 | Box 45 \ 1 Scan157 | |
| Letter from Dunlop Rubber Co Ltd concerning the testing of Straight Side Tyres for noise. | 10th Dec 1920 | Box 45 \ 1 Scan158 | |
| Letter from Dunlop Rubber Co. concerning the replacement of tyres with a modified pattern. | 14th Dec 1920 | Box 45 \ 1 Scan159 | |
| Tool for dismantling the flange on wheels with straight-sided tyres. | 14th Dec 1920 | Box 45 \ 1 Scan160 | |
| Letter to Dunlop Rubber Co. regarding the testing of their straight-sided tyres and the effects on noise. | 18th Dec 1920 | Box 45 \ 1 Scan161 | |
| Letter to the Dunlop Rubber Co. regarding a serious tyre wear issue caused by pebbles and flint getting stuck in the V-slots. | 20th Dec 1920 | Box 45 \ 1 Scan162 | |
| Letter from Dunlop regarding special tyres for an experimental car, discussing mould modifications and delivery. | 20th Dec 1920 | Box 45 \ 1 Scan163 | |
| Experimental modifications to a car being loaned for the Christmas holidays. | 24th Dec 1920 | Box 45 \ 1 Scan164 | |
| Letter from Dunlop Rubber Co Ltd discussing modifications to tyre tread patterns to prevent them from picking up grit and stone. | 21th Dec 1920 | Box 45 \ 1 Scan165 | |
| Continuation sheet of a letter from Dunlop Rubber Co. concerning a properly moulded pattern. | 21th Dec 1920 | Box 45 \ 1 Scan166 | |
| Test report on Dunlop straight-sided tyres fitted to an experimental car, assessing ride comfort and noise levels. | 29th Dec 1920 | Box 45 \ 1 Scan167 | |
| Letter from Dunlop seeking feedback on the noiselessness of new 33 x 5 tyres being tested on an Experimental Car. | 3rd Jan 1921 | Box 45 \ 1 Scan168 | |
| Letter to the Dunlop Rubber Co. Ltd. regarding tyre test results and noise levels. | 4th Jan 1921 | Box 45 \ 1 Scan169 | |
| Letter to The Dunlop Rubber Co. Ltd. enclosing a report on the tyre mileage of experimental Arrow Tread tyres. | 14th Jan 1921 | Box 45 \ 1 Scan170 | |
| Test report logging mileage and performance of Dunlop straight-sided tyres with the latest type arrow tread. | 14th Jan 1921 | Box 45 \ 1 Scan171 | |
| Vehicle mileage and tyre performance log from December 1920 to January 1921. | 14th Jan 1921 | Box 45 \ 1 Scan172 | |
| Log sheet tracking tyre mileage, position, and performance over various dates and routes. | 19th Jan 1921 | Box 45 \ 1 Scan173 | |
| To Mr. Warwick about arranging a date for testing straight-sided tyres with the Dunlop Rubber Co. Ltd. | 19th Jan 1921 | Box 45 \ 1 Scan174 | |
| To the Experimental Department about arranging a date with Dunlop Rubber Co Ltd. for testing Straight Sided Tyres. | 19th Jan 1921 | Box 45 \ 1 Scan175 | |
| Copy of a letter from The Dunlop Rubber Co Ltd. regarding further tests on Straight Sided Tyres. | 14th Jan 1921 | Box 45 \ 1 Scan176 | |
| Comparing the price of Goodyear or Goodrich tyres in the USA with the price of tyres in the UK, requesting the cost for Dunlop tyres. | 9th Feb 1921 | Box 45 \ 1 Scan177 | |
| Letter to The Dunlop Rubber Co. Ltd. providing feedback on the noise levels of a new set of test tyres. | 10th Feb 1921 | Box 45 \ 1 Scan178 | |
| Mileage test log for Dunlop straight-sided tyres, recording daily routes, speeds, and road conditions. | 11th Jan 1921 | Box 45 \ 1 Scan179 | |
| Log sheet detailing daily tyre testing results including mileage, routes, and performance remarks. | 27th Jan 1921 | Box 45 \ 1 Scan180 | |
| Log sheet detailing tyre fitment, position, and mileage over several days. | 30th Jan 1921 | Box 45 \ 1 Scan181 | |
| Letter from Dunlop regarding the noise performance of Straight Side Tyres and a proposal for new moulded tyres for testing. | 14th Feb 1921 | Box 45 \ 1 Scan182 | |
| Letter to The Dunlop Rubber Co. regarding a report on the mileage of experimental tyres. | 21th Feb 1921 | Box 45 \ 1 Scan183 | |
| Log detailing mileage and performance of a set of Dunlop experimental tyres. | 21th Feb 1921 | Box 45 \ 1 Scan184 | |
| Letter to The Dunlop Rubber Co. Ltd. regarding an attached tyre mileage report. | 23th Mar 1921 | Box 45 \ 1 Scan185 | |
| Experimental test log for Dunlop tyres, detailing mileage and performance remarks over several days. | 23th Mar 1921 | Box 45 \ 1 Scan186 | |
| Log of daily tyre mileage, routes taken, and performance remarks. | 21th Mar 1921 | Box 45 \ 1 Scan187 | |
| Dispatch of wire wheels from The Dunlop Rim & Wheel Co Ltd. | 4th Apr 1921 | Box 45 \ 1 Scan188 | |
| Acceptable gap for the loose flange on Dunlop wheels for straight-sided tyres. | 5th Apr 1921 | Box 45 \ 1 Scan189 | |
| Letter to Dunlop Rubber Co. Ltd. regarding a mileage report for experimental straight-sided tyres. | 13th Apr 1921 | Box 45 \ 1 Scan190 | |
| Fortnightly report on the performance test of Dunlop straight-sided tyres. | 9th Apr 1921 | Box 45 \ 1 Scan191 | |
| Log sheet detailing tyre testing, mileage, routes, and performance remarks. | 8th Apr 1921 | Box 45 \ 1 Scan192 | |
| The inspection and potential adoption of a new Dunlop Magnum Treaded tyre. | 26th Apr 1921 | Box 45 \ 1 Scan193 | |
| Performance and testing of straight-sided Dunlop cord tyres. | 28th Apr 1921 | Box 45 \ 1 Scan194 | |
| Letter to Dunlop Rubber Co. Ltd. regarding a mileage report for experimental tyres. | 3rd May 1921 | Box 45 \ 1 Scan195 | |
| Test log for experimental Dunlop straight-sided tyres, tracking mileage and performance. | 18th Apr 1921 | Box 45 \ 1 Scan196 | |
| Daily mileage and tyre performance log for a car. | 19th Apr 1921 | Box 45 \ 1 Scan197 | |
| Log sheet recording daily mileage, tyre positions, and performance remarks. | 29th Apr 1921 | Box 45 \ 1 Scan198 | |
| Letter from Dunlop Rubber Co Ltd inviting a test of their Straight Side Tyres. | 6th May 1921 | Box 45 \ 1 Scan199 | |
| Letter to The Dunlop Rubber Co. Ltd. regarding the availability of a test car fitted with their straight-sided tyres. | 7th May 1921 | Box 45 \ 1 Scan200 | |
| Letter from Dunlop Rubber Co Ltd arranging a meeting for a test car on Dunlop Straight Side Tyres. | 9th May 1921 | Box 45 \ 1 Scan201 | |
| Letter from Dunlop regarding experimental tyre noise and subsequent alterations for further testing. | 13th May 1921 | Box 45 \ 1 Scan202 | |
| Advantages and potential adoption of Dunlop's straight side tyres. | 31th May 1921 | Box 45 \ 1 Scan203 | |
| Conversation and agreement with the Dunlop Rubber Co. to test their straight-side tyres. | 3rd Jun 1921 | Box 45 \ 1 Scan204 | |
| Seeking clarification on the standardisation of wire wheels with removable flanges for straight-side tyres. | 3rd Jun 1921 | Box 45 \ 1 Scan205 | |
| Visit to the Dunlop Rubber Co regarding the commercial supply and experimental testing of straight-side tyres. | 1st Jun 1921 | Box 45 \ 1 Scan206 | |
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