| Description | Date | Identifier | |
| Letter from Dunlop Rubber Co., Ltd. to Mr. W. A. Robotham arranging a meeting. | 11th Oct 1937 | Box 157 \ 2 scan0200 | |
| The performance, noise issues, and replacement arrangements for new pattern Dunlop tyres. | 25th Oct 1937 | Box 157 \ 2 scan0201 | |
| Procurement of Dunlop tyres for Trials Cars and the use of the old worn tyres. | 28th Oct 1937 | Box 157 \ 2 scan0202 | |
| Internal request to order ten 6.50 x 17 Dunlop tyre covers and tubes. | 1st Nov 1937 | Box 157 \ 2 scan0203 | |
| Dunlop tyres for Phantom III and 25/30 models, comparing the old '90' tyre with a new 2000 tooth version. | 18th Nov 1937 | Box 157 \ 2 scan0204 | |
| Arranging a new tyre supply from Dunlops and inquiring about the status of ongoing tyre trials. | 22th Nov 1937 | Box 157 \ 2 scan0205 | |
| Official order be sent to Dunlops for specific tyres. | 22th Nov 1937 | Box 157 \ 2 scan0206 | |
| Letter from Dunlop Rubber Co. discussing tyre options, testing, and supply for various chassis models. | 23th Nov 1937 | Box 157 \ 2 scan0207 | |
| Letter from Dunlop Rubber Co. Ltd. concerning tyre mileage and the availability of new Fort tyres. | 23th Nov 1937 | Box 157 \ 2 scan0208 | |
| Letter to Dunlop Rubber Co. Ltd. authorising the use of a Skid Pan for tyre testing. | 1st Dec 1937 | Box 157 \ 2 scan0209 | |
| Letter from Dunlop Rubber Co. Ltd. regarding an agreement for tyre testing on the Skid Pan. | 2nd Dec 1937 | Box 157 \ 2 scan0210 | |
| Letter to Dunlop Rubber Co. regarding a visit to demonstrate work on a Skid Pan. | 3rd Dec 1937 | Box 157 \ 2 scan0211 | |
| Letter from Dunlop Rubber Co. Ltd. proposing a meeting to discuss outstanding items regarding wheels. | 3rd Dec 1937 | Box 157 \ 2 scan0212 | |
| Letter to Dunlop Rubber Co. Ltd. proposing new dates for a meeting to discuss wheels. | 4th Dec 1937 | Box 157 \ 2 scan0213 | |
| Letter from Dunlop Rubber Co. confirming a meeting for the 9th instant. | 6th Dec 1937 | Box 157 \ 2 scan0214 | |
| Letter from Dunlop Rubber Co. Ltd. confirming tyre pricing for a contract period. | 6th Dec 1937 | Box 157 \ 2 scan0215 | |
| Letter from Dunlop regarding the delivery and testing of 7.50-18 Special Fort Covers. | 10th Dec 1937 | Box 157 \ 2 scan0216 | |
| Letter from Dunlop Rubber Co. Ltd. rescheduling Skid Pan tests due to a car accident. | 14th Dec 1937 | Box 157 \ 2 scan0217 | |
| Letter to F.G.W. King of Dunlop Rubber Co., Ltd. regarding a meeting arrangement. | 15th Dec 1937 | Box 157 \ 2 scan0218 | |
| Letter to the Dunlop Rubber Co. Ltd. regarding criticisms of a steering angle curve for a Humber vehicle. | 20th Dec 1937 | Box 157 \ 2 scan0219 | |
| Letter from Dunlop Rubber Co. Ltd. acknowledging receipt of a steering angle curve for a Humber car. | 30th Dec 1937 | Box 157 \ 2 scan0220 | |
| Testing larger 7.50 section Dunlop tyres on a Phantom III chassis, noting performance issues and recommending against their use. | 11th Jan 1938 | Box 157 \ 2 scan0221 | |
| Letter to Dunlop Rubber Co. Ltd. regarding the testing of 7.50 x 18 tyres. | 12th Jan 1938 | Box 157 \ 2 scan0222 | |
| Performance and characteristics of larger tyres on a Phantom III vehicle. | 12th Jan 1938 | Box 157 \ 2 scan0223 | |
| Comparison of three different tires with varying sizes and tread pitch designs. | 17th Jan 1938 | Box 157 \ 2 scan0224 | |
| Letter from Dunlop Rubber Co. Ltd. arranging to use a Skid Pan. | 17th Jan 1938 | Box 157 \ 2 scan0225 | |
| Letter to Dunlop Rubber Co., Ltd. confirming the availability of the Skid Pan. | 18th Jan 1938 | Box 157 \ 2 scan0226 | |
| Letter to Dunlop Rubber Co. Ltd. requesting experimental tyres for testing and outlining noise acceptance criteria. | 18th Jan 1938 | Box 157 \ 2 scan0227 | |
| Letter from Dunlop Rubber Co. Ltd. confirming reinstatement of work on a mould for 'C' type tyres. | 20th Jan 1938 | Box 157 \ 2 scan0228 | |
| Table listing Bentley tyre weights and prices for different sizes and makes. | 29th Jan 1938 | Box 157 \ 2 scan0229 | |
| Letter from Dunlop Rubber Co. Ltd. confirming stock availability of covers and tubes for testing. | 7th Feb 1938 | Box 157 \ 2 scan0230 | |
| Letter to Dunlop Rubber Co. Ltd. requesting a set of covers and tubes for testing. | 5th Feb 1938 | Box 157 \ 2 scan0231 | |
| Requesting an official order be sent to Dunlops for tyre covers and tubes. | 14th Feb 1938 | Box 157 \ 2 scan0232 | |
| Letter to Dunlops Limited regarding the non-receipt of five 6.50 X 16 covers and tubes. | 25th Feb 1938 | Box 157 \ 2 scan0233 | |
| Letter from Dunlop Rubber Co., Ltd. regarding the despatch of covers and tubes. | 26th Feb 1938 | Box 157 \ 2 scan0234 | |
| Letter from Dunlop regarding the supply and improvement of 7.50-18 variable pitch tyres. | 3rd Mar 1938 | Box 157 \ 2 scan0235 | |
| Official order be sent to Dunlops for four 'C' type tyres. | 4th Mar 1938 | Box 157 \ 2 scan0236 | |
| Return of a loaned sample tyre. | 8th Mar 1938 | Box 157 \ 2 scan0237 | |
| Return of a loaned inner tube to Messrs. Dunlops. | 9th Mar 1938 | Box 157 \ 2 scan0238 | |
| Letter from Dunlop confirming production of 7.50-18 'C' type tyre covers and an order alteration. | 10th Mar 1938 | Box 157 \ 2 scan0239 | |
| Letter to Dunlop's Ltd. requesting a quotation for specially made 4-ply tyres for comparison testing. | 12th Mar 1938 | Box 157 \ 2 scan0240 | |
| Return of incorrectly supplied Dunlop covers to the makers for exchange. | 14th Mar 1938 | Box 157 \ 2 scan0241 | |
| Requesting an official order be sent to Dunlops for four 6½ x 16 4-ply tyre covers, and returning a previous set. | 14th Mar 1938 | Box 157 \ 2 scan0242 | |
| Letter to Dunlop requesting performance figures for 4-ply tyres to compare against 6-ply tyres. | 18th Mar 1938 | Box 157 \ 2 scan0243 | |
| Letter from Dunlop regarding tyre pressure recommendations for experimental tyres. | 21th Mar 1938 | Box 157 \ 2 scan0244 | |
| Letter from Dunlop Rubber Co. Ltd. regarding an order for tyres, despatch details, and a special discount for experimental purposes. | 21th Mar 1938 | Box 157 \ 2 scan0245 | |
| Requesting to obtain ten 6.50 x 17 Dunlop covers and tubes. | 31th Mar 1938 | Box 157 \ 2 scan0246 | |
| Letter from Dunlop Rubber Co. Ltd. requesting to use the Skid Pan. | 9th Apr 1938 | Box 157 \ 2 scan0247 | |
| Letter to Dunlop Rubber Co., Ltd. confirming the availability of the Skid Pan. | 12th Apr 1938 | Box 157 \ 2 scan0248 | |
| Letter from Dunlop Rubber Co. discussing the results of investigations into the contact length of their new Fort pattern tyres. | 20th Apr 1938 | Box 157 \ 2 scan0249 | |
| Request to order 10 Dunlop 6.50 x 17 tyre covers for use on experimental cars. | 3rd May 1938 | Box 157 \ 2 scan0250 | |
| Order be sent to Dunlop Rubber Co. for tyres. | 5th May 1938 | Box 157 \ 2 scan0251 | |
| Letter from Dunlop Rubber Co. Ltd. enquiring if the sample 7.50-18 'C' type tyres will be standardised for the Phantom lll chassis production. | 7th May 1938 | Box 157 \ 2 scan0252 | |
| Letter to The Dunlop Rubber Co. Ltd. regarding the testing of 7.50 inch 'C' type tyres for the Phantom III. | 9th May 1938 | Box 157 \ 2 scan0253 | |
| Covering order for tyres and tubes ordered from Dunlops. | 11th May 1938 | Box 157 \ 2 scan0254 | |
| Tyre sizes, costs, and wheel nut alterations for the Wraith model. | 11th May 1938 | Box 157 \ 2 scan0255 | |
| Letter to Dunlop Rubber Co. Ltd. regarding the use and accounting of the Skid Pan facility. | 23th May 1938 | Box 157 \ 2 scan0256 | |
| Requesting an order for 10 Dunlop Fort tyre covers for experimental use. | 3rd Jun 1938 | Box 157 \ 2 scan0257 | |
| Letter to Dunlop Rubber Co. Ltd. requesting the weight of experimental 4-ply tyres. | 4th Jun 1938 | Box 157 \ 2 scan0258 | |
| Letter from Dunlop Rubber Co. Ltd. regarding the weights of various 6.50-16 tyre covers and their construction. | 9th Jun 1938 | Box 157 \ 2 scan0259 | |
| Letter to Dunlop Rubber Co. Ltd. requesting to try their standard 4-ply tyres and asking for tread life information. | 10th Jun 1938 | Box 157 \ 2 scan0260 | |
| Covering order for tyres from The Dunlop Rubber Co. Ltd. | 10th Jun 1938 | Box 157 \ 2 scan0261 | |
| Letter from Dunlop Rubber Co. Ltd. concerning the dispatch and relative life of tyres. | 11th Jun 1938 | Box 157 \ 2 scan0262 | |
| Letter to Dunlop Rubber Co. Ltd. requesting blueprints for Schrader valves for a new tyre inflation arrangement on wire wheels. | 20th Jun 1938 | Box 157 \ 2 scan0263 | |
| Letter from Dunlop regarding their inability to provide dimensions for a proprietary valve core or chamber. | 21th Jun 1938 | Box 157 \ 2 scan0264 | |
| Letter from Dunlop Rubber Co. Ltd. suggesting direct contact with Schrader's Technical Department to resolve an enquiry. | 22th Jun 1938 | Box 157 \ 2 scan0265 | |
| Letter to Dunlop Rubber Co. Ltd. arranging a meeting to discuss a previously mentioned problem. | 23th Jun 1938 | Box 157 \ 2 scan0266 | |
| Letter from Dunlop Rubber Co., Ltd. confirming a meeting with Mr. Winter. | 24th Jun 1938 | Box 157 \ 2 scan0267 | |
| Letter from Dunlop Rubber Co., Ltd. regarding the postponement of a proposed call with Mr. Winter. | 28th Jun 1938 | Box 157 \ 2 scan0268 | |
| Letter to Dunlop Rubber Co. Ltd. regarding a meeting to discuss new steel wheels and tyres. | 1st Jul 1938 | Box 157 \ 2 scan0269 | |
| Letter to Dunlop Rubber Co. Ltd. requesting four experimental inner tubes for experiments on wheel discs. | 6th Jul 1938 | Box 157 \ 2 scan0270 | |
| Letter from Dunlop Rubber Co. regarding the production and ordering of 6.50-17 tubes with rubber valves. | 8th Jul 1938 | Box 157 \ 2 scan0271 | |
| Letter from Dunlop regarding the collection and testing of experimental tyre covers. | 8th Jul 1938 | Box 157 \ 2 scan0272 | |
| Letter from Dunlop Rubber Co. confirming the dispatch of four 6.50-17 rubber valve tubes. | 12th Jul 1938 | Box 157 \ 2 scan0273 | |
| Letter from Dunlop Rubber Co. Ltd. confirming the dispatch of four 6.50-17 tubes with rubber valves. | 14th Jul 1938 | Box 157 \ 2 scan0274 | |
| Letter from Dunlop regarding the delivery of 7.00-17 'C' Type Fort Covers. | 18th Jul 1938 | Box 157 \ 2 scan0275 | |
| Letter from Dunlop Rubber Co. Ltd. regarding the supply of tyre tubes with rubber valves. | 18th Jul 1938 | Box 157 \ 2 scan0276 | |
| Requesting the despatch of two Dunlop wheels and tyres to Mr. Price of Dunlop's in Birmingham. | 18th Jul 1938 | Box 157 \ 2 scan0277 | |
| Letter to Dunlop Rubber Co. Ltd. confirming the dispatch of two wheels with tyres. | 18th Jul 1938 | Box 157 \ 2 scan0278 | |
| Letter from Dunlop Rubber Co. Ltd. detailing laboratory test results on tyre covers, discussing abrasion, short mileage, and possible misalignment. | 18th Jul 1938 | Box 157 \ 2 scan0279 | |
| Letter to Dunlop Rubber Co. Ltd. requesting modification to two worn 'India' tyres. | 19th Jul 1938 | Box 157 \ 2 scan0280 | |
| Letter to Dunlop Rubber Co. Ltd. requesting the return of worn tyres for their 'museum'. | 20th Jul 1938 | Box 157 \ 2 scan0281 | |
| Letter from Dunlop Rubber Co. confirming receipt of worn tyres and the plan to reproduce the road contact width on new ones. | 20th Jul 1928 | Box 157 \ 2 scan0282 | |
| Letter from Dunlop Rubber Co. Ltd. discussing contact areas of new and worn tyres with attached diagrams. | 21th Jul 1938 | Box 157 \ 2 scan0283 | |
| Sketch and data for a worn tyre contact patch analysis. | 1st Jul 1938 | Box 157 \ 2 scan0284 | |
| Sketch and specifications of a tire contact patch. | 1st Jul 1938 | Box 157 \ 2 scan0285 | |
| Letter from Dunlop Rubber Co. Ltd. regarding the reshaping and despatch of worn tyres. | 22th Jul 1938 | Box 157 \ 2 scan0286 | |
| Letter from Dunlop Rubber Co. Ltd. regarding a final decision on the use of 7.50-18 'C' type tyres for first equipment purposes. | 28th Jul 1938 | Box 157 \ 2 scan0287 | |
| Letter to Dunlop Rubber Co. Ltd. regarding the standardization of a 7.50 x 18 'C' type tyre. | 29th Jul 1938 | Box 157 \ 2 scan0288 | |
| Analysis comparing the lifespan of Wraith tyres against 25/30 tyres, including data from tests in France. | 2nd Aug 1938 | Box 157 \ 2 scan0289 | |
| Log of tyre mileages for vehicles 22GV and 26CVI. | 5th Aug 1938 | Box 157 \ 2 scan0290 | |
| Tyre life and performance, comparing different models and mileage data. | 5th Aug 1938 | Box 157 \ 2 scan0291 | |
| Tyre wear, mileage, and potential modifications to tyre size and gear ratios for the Wraith limousine. | 5th Aug 1938 | Box 157 \ 2 scan0292 | |
| Average tyre mileage for the Wraith and 25/30 models. | 5th Aug 1938 | Box 157 \ 2 scan0293 | |
| Confirming a telephone order for Dunlop tyres. | 23th Aug 1938 | Box 157 \ 2 scan0294 | |
| Request to send an order to the Dunlop Co. for one Fort type tyre for a Bentley III. | 25th Aug 1938 | Box 157 \ 2 scan0295 | |
| Letter to Dunlop Rubber Co. Ltd. regarding the identification and ordering of a specific tyre. | 25th Aug 1938 | Box 157 \ 2 scan0296 | |
| Request to send a 6.50 x 16 Fort tyre to The Dunlop Co. Ltd. for examination. | 25th Aug 1938 | Box 157 \ 2 scan0297 | |
| Letter from Dunlop regarding the inspection of a 6.50 x 16 Fort tyre cover, discussing its features and pattern. | 26th Aug 1938 | Box 157 \ 2 scan0298 | |
| Letter from Dunlop regarding power consumption data and the supply of special tyres for steering tests. | 2nd Sep 1938 | Box 157 \ 2 scan0299 | |
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