| Description | Date | Identifier | |
| Letter from India Tyre & Rubber Company regarding testing results for new design tyres. | 17th Oct 1936 | Box 157 \ 6 scan0117 | |
| Invoice for experimental tyres and tubes from the India Tyre & Rubber Co. Ltd. | 23th Oct 1936 | Box 157 \ 6 scan0118 | |
| Official order for four 6.00x17 Super covers from India Tyre & Rubber Co. Ltd. | 26th Oct 1936 | Box 157 \ 6 scan0119 | |
| Letter from a tyre company regarding a complaint about chafing inner tubes fitted to a Bentley. | 4th Nov 1936 | Box 157 \ 6 scan0120 | |
| Order for India Covers and tubes for experimental cars. | 5th Jan 1936 | Box 157 \ 6 scan0121 | |
| Letter to India Tyre & Rubber Company regarding tyre stability and rim width on a Bentley. | 10th Nov 1936 | Box 157 \ 6 scan0122 | |
| Letter from a tyre manufacturer discussing rim widths, tyre construction, and a trial set of tyres for a Bentley. | 14th Nov 1936 | Box 157 \ 6 scan0123 | |
| Page two of a letter from India Tyre & Rubber Company Ltd. to W. A. Robotham regarding stability pressures. | 13th Nov 1936 | Box 157 \ 6 scan0124 | |
| Letter from India Tyre & Rubber Company regarding badly fitted tyres on a Bentley. | 18th Nov 1936 | Box 157 \ 6 scan0125 | |
| Letter to The India Tyre & Rubber Co. discussing the road holding qualities of 6 x 17' tyres compared to Dunlop tyres. | 7th Dec 1936 | Box 157 \ 6 scan0126 | |
| Letter from a tyre supplier regarding a manufacturing change to inner tubes to resolve a fitting issue. | 4th Dec 1936 | Box 157 \ 6 scan0127 | |
| Letter from India Tyre & Rubber Company regarding check tests on a Dunlop 6.00/17 tyre. | 9th Dec 1936 | Box 157 \ 6 scan0128 | |
| Letter from the Experimental Department requesting tyres for a Bentley chassis undergoing endurance testing in France. | 7th Jan 1937 | Box 157 \ 6 scan0129 | |
| Letter from India Tyre & Rubber Company Ltd. acknowledging receipt of a letter and advising the request has been passed on. | 8th Jan 1937 | Box 157 \ 6 scan0130 | |
| Letter to the India Tyre & Rubber Company discussing comparative tyre tests and performance. | 7th Jan 1937 | Box 157 \ 6 scan0131 | |
| Letter from India Tyre & Rubber Co. comparing their tyre's road contact and nonskid properties against a Dunlop tyre. | 6th Jan 1937 | Box 157 \ 6 scan0132 | |
| Letter to W. A. Robotham regarding a set of experimental wheels and a potential arrangement for Mr. Summers. | 6th Jan 1937 | Box 157 \ 6 scan0133 | |
| Specifications and tread pattern for a Dunlop '90' (Fort) tyre. | 6th Jan 1937 | Box 157 \ 6 scan0134 | |
| Specification sheet for an India Super 'B' tyre, including a tread pattern print and dimensional data. | 12th Apr 1937 | Box 157 \ 6 scan0135 | |
| Confirmation memo of a telephone conversation regarding an urgent order for tyres and tubes. | 12th Apr 1937 | Box 157 \ 6 scan0136 | |
| Four 6.50 wheels and India tyres for Mr. Lappin's car. | 14th Apr 1937 | Box 157 \ 6 scan0137 | |
| The despatch of four 6.50 x 17 wheels and tyres to the Kingsbury Department. | 14th Apr 1937 | Box 157 \ 6 scan0138 | |
| Requesting to obtain a further five 6.50 x 17 India covers and tubes. | 14th Apr 1937 | Box 157 \ 6 scan0139 | |
| Letter to the India Tyre & Rubber Co. regarding an order and testing of tyres for an Experimental Bentley chassis. | 20th Apr 1937 | Box 157 \ 6 scan0140 | |
| The dispatch of India covers and tubes to a location in France. | 28th Apr 1937 | Box 157 \ 6 scan0141 | |
| Letter from a tyre company regarding experimental tyre mould modifications and tyre pressures. | 30th Apr 1937 | Box 157 \ 6 scan0142 | |
| Letter from India Tyre & Rubber Company Ltd. confirming the shipment of tyres and tubes. | 30th Apr 1937 | Box 157 \ 6 scan0143 | |
| Letter to The India Tyre & Rubber Company increasing an order for 6½ x 17' tyres from six to twelve. | 3rd May 1937 | Box 157 \ 6 scan0144 | |
| Letter from a tyre company regarding the production of experimental tyres with a modified, quieter tread design. | 4th May 1937 | Box 157 \ 6 scan0145 | |
| Letter to The India Tyre & Rubber Co. Ltd. enquiring when specific 6.50 X 17 tyres will be ready for testing. | 24th Jun 1937 | Box 157 \ 6 scan0146 | |
| Letter to the India Tyre & Rubber Company regarding urgent noise complaints about existing tyres. | 25th Jun 1937 | Box 157 \ 6 scan0147 | |
| Letter from India Tyre & Rubber Co. regarding a delay in the delivery of 6.50/17 tyres. | 25th Jun 1937 | Box 157 \ 6 scan0148 | |
| Letter from the India Tyre & Rubber Company regarding a delay in the delivery of silent tread tyres. | 26th Jun 1937 | Box 157 \ 6 scan0149 | |
| Letter to India Tyre & Rubber Company Ltd clarifying the quantity of tyres required for testing. | 29th Jun 1937 | Box 157 \ 6 scan0150 | |
| Letter chasing a delayed delivery of silent tyres from the India Tyre & Rubber Company Ltd. | 28th Jul 1937 | Box 157 \ 6 scan0151 | |
| Letter from a tyre supplier regarding the dispatch of an order of tyre covers. | 30th Jul 1937 | Box 157 \ 6 scan0152 | |
| Letter from India Tyre & Rubber Company regarding the delivery of special silent tread tyres. | 2nd Aug 1937 | Box 157 \ 6 scan0153 | |
| Letter from a tyre manufacturer regarding the testing and design of a silent tyre for a Bentley. | 5th Aug 1937 | Box 157 \ 6 scan0154 | |
| Letter to India Tyre & Rubber Company expressing disappointment with the performance of their latest tyres for Bentley. | 16th Aug 1937 | Box 157 \ 6 scan0155 | |
| Letter from India Tyre & Rubber Company regarding the silent performance of 6.50/17 tyres and arranging a meeting. | 18th Aug 1937 | Box 157 \ 6 scan0156 | |
| Letter to India Tyre & Rubber Co. Ltd. regarding a meeting arrangement. | 19th Aug 1937 | Box 157 \ 6 scan0157 | |
| Letter from India Tyre & Rubber Company, Ltd. arranging a meeting in Derby. | 21th Aug 1937 | Box 157 \ 6 scan0158 | |
| Correspondence regarding tyre noise tests on a Bentley and a request for tyre tread measurements. | 26th Aug 1937 | Box 157 \ 6 scan0159 | |
| Comparison of new 6.50x17 India tyres against standard 5.50x18 tyres on a Bentley at Donnington. | 26th Aug 1937 | Box 157 \ 6 scan0160 | |
| Report discussing steering wobble and tyre performance tests. | 27th Aug 1937 | Box 157 \ 6 scan0161 | |
| Letter to India Tyre & Rubber Co. Ltd. comparing the cornering power and measurements of Dunlop and India tyres. | 27th Aug 1937 | Box 157 \ 6 scan0162 | |
| Letter from the India Tyre & Rubber Company regarding tyre performance data. | 28th Aug 1937 | Box 157 \ 6 scan0163 | |
| Letter from a tyre company regarding the redesign, testing, and shipping of tyres. | 6th Sep 1937 | Box 157 \ 6 scan0164 | |
| Design drawing for a 6.50/17 tyre tread pattern. | 1st May 1927 | Box 157 \ 6 scan0165 | |
| Letter from India Tyre & Rubber Company regarding tests on a new 6.50/17 tyre design. | 13th Sep 1937 | Box 157 \ 6 scan0166 | |
| Letter to The India Tyre & Rubber Co. Ltd. providing feedback on tyre testing, including cornering, silence, and oversteer performance. | 23th Sep 1937 | Box 157 \ 6 scan0167 | |
| Letter from India Tyre & Rubber Co. regarding modified tyres to improve cornering ability. | 24th Sep 1937 | Box 157 \ 6 scan0168 | |
| Table detailing the effective running radius of various tyres at 90 m.p.h. | 24th Sep 1937 | Box 157 \ 6 scan0169 | |
| Letter to The India Tyre & Rubber Co. detailing the results of skid pan tests on different silent tyres. | 4th Oct 1937 | Box 157 \ 6 scan0170 | |
| The return of sample India tyres to the supplier. | 5th Oct 1937 | Box 157 \ 6 scan0171 | |
| Letter to India Tyre & Rubber Company requesting a supply of 6 1/2 x 17 tyres and enquiring about the development of a silent tyre. | 21th Oct 1937 | Box 157 \ 6 scan0172 | |
| Letter from India Tyre & Rubber Company regarding the production of more 6.50-17 tyres and the receipt of a returned unsatisfactory set. | 22th Oct 1937 | Box 157 \ 6 scan0173 | |
| Letter from India Tyre & Rubber Company regarding the development and testing of 6.50/17 silent tread tyres for Bentley cars. | 4th Nov 1937 | Box 157 \ 6 scan0174 | |
| Letter from India Tyre & Rubber Company regarding tube failures on the Bentley. | 5th Nov 1937 | Box 157 \ 6 scan0175 | |
| Letter addressing complaints of tyre damage caused by coachbuilders refitting tyres after painting wheels. | 8th Nov 1937 | Box 157 \ 6 scan0176 | |
| Letter to The India Tyre & Rubber Company concerning silent tyres and seeking information on new Michelin 'Pilot' tyre patents. | 10th Nov 1937 | Box 157 \ 6 scan0177 | |
| Letter from India Tyre & Rubber Company regarding the 'Bentley Silent Tyre' design, production moulds, and patents. | 11th Nov 1937 | Box 157 \ 6 scan0178 | |
| Invoice from the India Tyre & Rubber Co. Ltd. for Bentley Tread Super Covers and seeking authorisation for payment. | 15th Nov 1937 | Box 157 \ 6 scan0179 | |
| Official covering orders for tyres from the India Tyre & Rubber Co. Ltd. | 16th Nov 1937 | Box 157 \ 6 scan0180 | |
| Letter from India Tyre & Rubber Company regarding the features and potential patent issues of the Michelin 'Pilot' tyre. | 17th Nov 1937 | Box 157 \ 6 scan0181 | |
| Letter to The India Tyre & Rubber Co. Ltd. requesting a set of experimental tyres. | 3rd Dec 1937 | Box 157 \ 6 scan0182 | |
| Letter to India Tyre & Rubber Co. Ltd. requesting confirmation of the effective circumference of a new tyre for a Bentley. | 8th Dec 1937 | Box 157 \ 6 scan0183 | |
| Letter from a tyre manufacturer regarding tyre circumference and running pressure. | 10th Dec 1937 | Box 157 \ 6 scan0184 | |
| Letter from a tyre manufacturer detailing performance specifications for a silent tyre. | 13th Dec 1937 | Box 157 \ 6 scan0185 | |
| Letter from a tyre manufacturer regarding the production of new silent tyres for Bentley, including mould making and size options. | 14th Jan 1938 | Box 157 \ 6 scan0186 | |
| Letter to India Tyre & Rubber Co. Ltd. regarding experimental tyre testing and supply. | 17th Jan 1938 | Box 157 \ 6 scan0187 | |
| Letter from India Tyre & Rubber Co. confirming they will proceed with making 6.50/16 and 6.50/17 tyres for testing. | 18th Jan 1938 | Box 157 \ 6 scan0188 | |
| Letter to a tyre company asking for their views on the difference in cornering power between 4-ply and 6-ply tyres. | 27th Jan 1938 | Box 157 \ 6 scan0189 | |
| Table detailing Bentley tyre weights and prices. | 29th Jan 1938 | Box 157 \ 6 scan0190 | |
| Letter to the India Tyre & Rubber Company about the potential loss of the Bentley tyre supply business due to pricing. | 1st Feb 1938 | Box 157 \ 6 scan0191 | |
| Letter from a tyre supplier regarding the price position of new tyres for the Bentley, mentioning competition. | 3rd Feb 1938 | Box 157 \ 6 scan0192 | |
| Request to obtain 10 India tyre covers, size 6.50 x 17, for use on experimental cars. | 21th Jun 1938 | Box 157 \ 6 scan0193 | |
| Letter from India Tyre & Rubber Company requesting recommended tyre pressures for a 4¼ litre Bentley. | 25th Jun 1938 | Box 157 \ 6 scan0194 | |
| Letter from the Experimental Department recommending tyre pressures for the 4.25-litre Bentley. | 27th Jun 1938 | Box 157 \ 6 scan0195 | |
| Letter from India Tyre & Rubber Company regarding the development of a new tyre for the Bentley. | 7th Jul 1938 | Box 157 \ 6 scan0196 | |
| Letter to India Tyre & Rubber Company regarding Mr. Robotham's absence. | 9th Jul 1938 | Box 157 \ 6 scan0197 | |
| Letter from India Tyre & Rubber Company, Ltd. acknowledging receipt of correspondence and advising of Mr. Robotham's absence. | 11th Jul 1938 | Box 157 \ 6 scan0198 | |
| Letter from India Tyre & Rubber Company, Ltd. confirming an arrival time in Derby. | 25th Jul 1938 | Box 157 \ 6 scan0199 | |
| Clarifying tyre requirements for mid-September. | 29th Jul 1938 | Box 157 \ 6 scan0200 | |
| Letter to The India Tyre & Rubber Co. Ltd. regarding a confusion over tyre sizes. | 29th Jul 1938 | Box 157 \ 6 scan0201 | |
| Dispatch of a tyre cover to The India Tyre & Rubber Co. Ltd. following an examination. | 5th Aug 1938 | Box 157 \ 6 scan0202 | |
| Letter to The India Tyre & Rubber Co. Ltd. regarding moulds for the new 6.50 x 17 standard Bentley tyres. | 5th Aug 1938 | Box 157 \ 6 scan0203 | |
| Letter from a tyre supplier regarding the production and shipment of tyres. | 9th Sep 1938 | Box 157 \ 6 scan0204 | |
| Order for five 6.50 x 16 India Super Covers and tubes. | 9th Sep 1938 | Box 157 \ 6 scan0205 | |
| Letter to the India Tyre & Rubber Company requesting two 4-ply tyres for testing precession torque and cornering power. | 10th Sep 1938 | Box 157 \ 6 scan0206 | |
| Urgent internal request to obtain India Super covers and tubes for experimental use. | 15th Sep 1938 | Box 157 \ 6 scan0207 | |
| Message inquiring about the expected delivery date for a new type of 16-inch tyre. | 16th Sep 1938 | Box 157 \ 6 scan0208 | |
| Short typed message slip, likely a telegram record. | 19th Sep 1938 | Box 157 \ 6 scan0209 | |
| Telegram received by telephone concerning the shipping of tyres from Indiatyre. | 19th Sep 1938 | Box 157 \ 6 scan0210 | |
| Telegram from 'Indiatyre' regarding the shipping of tyres. | 19th Sep 1938 | Box 157 \ 6 scan0211 | |
| Invoices for tyres and tubes and their dispatch to two separate addresses. | 5th Oct 1938 | Box 157 \ 6 scan0212 | |
| Letter to The India Tyre & Rubber Co. regarding tyre testing, returning a faulty tyre, and requesting a different type. | 6th Oct 1938 | Box 157 \ 6 scan0213 | |
| Letter from a tyre company discussing modifications to tyre treads to eliminate whining at speed. | 7th Oct 1938 | Box 157 \ 6 scan0214 | |
| The dispatch of an 'India Special cover' to the India Tyre & Rubber Co. Ltd in Scotland. | 6th Oct 1938 | Box 157 \ 6 scan0215 | |
| Payment for tyres and confirmation of their delivery status. | 10th Oct 1938 | Box 157 \ 6 scan0216 | |
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