| Description | Date | Identifier | |
| Letter from Dunlop Rubber Co. regarding the skimming and re-grooving of two dynamometer tyres. | 27th Nov 1936 | Box 157 \ 1 scan0385 | |
| Inquiry to Dunlop regarding the delivery of 20/25 silent tread tyres and the status of tests on Phantom Three tyres. | 9th Jun 1936 | Box 157 \ 2 scan0001 | |
| Availability and production of new 'silent tyres' for the 25/30 HP chassis. | 9th Jun 1936 | Box 157 \ 2 scan0002 | |
| Letter from Dunlop Rubber Co. Ltd. regarding the delivery and testing of silent tread tyres. | 10th Jun 1936 | Box 157 \ 2 scan0003 | |
| Update from the Dunlop Rubber Co. on the delivery schedule for silent tyres for the 25/30 HP chassis. | 11th Jun 1936 | Box 157 \ 2 scan0004 | |
| Urgent order for Dunlop Fort Covers & Tubes. | 16th Jun 1936 | Box 157 \ 2 scan0005 | |
| Letter to Dunlop Ltd. requesting the collection of four Phantom III wheels and tyres from the Experimental Department. | 19th Jun 1936 | Box 157 \ 2 scan0006 | |
| Invoice from the Dunlop Rubber Co. Ltd. for five tyre covers. | 19th Jun 1936 | Box 157 \ 2 scan0007 | |
| Internal request for five silent tyres for the new trials car GUL-1. | 19th Aug 1938 | Box 157 \ 2 scan0008 | |
| Letter from Dunlop Rubber Co. arranging collection of four wheels and tyres from the Experimental Department. | 20th Jun 1936 | Box 157 \ 2 scan0009 | |
| Letter to Dunlop Ltd. regarding testing tyre groans and accelerating wear. | 20th Jun 1936 | Box 157 \ 2 scan0010 | |
| Request to despatch special silent Dunlop tyres for chassis GUL.1 to Lillie Hall. | 22th Jun 1936 | Box 157 \ 2 scan0011 | |
| Silent tyres for the 25/30 HP model. | 22th Jun 1936 | Box 157 \ 2 scan0012 | |
| Invoice from Dunlop Rubber Co. for five demonstration tyres to be charged to Sales. | 23th Jun 1936 | Box 157 \ 2 scan0013 | |
| Letter from Dunlop Rubber Co. Ltd. arranging the collection of tyre covers for testing. | 23th Jun 1936 | Box 157 \ 2 scan0014 | |
| Letter from Dunlop Rubber Co., Ltd. confirming a meeting arrangement with Mr. Grylls. | 23th Jun 1936 | Box 157 \ 2 scan0015 | |
| Correspondence from Dunlop Rubber Co. concerning the production and tooling for 5.00x18 wheels and rims. | 25th Jun 1936 | Box 157 \ 2 scan0016 | |
| Letter to the Dunlop Rubber Co. Ltd. confirming the intention to standardise a specific 5 x 18' wheel. | 26th Jun 1936 | Box 157 \ 2 scan0017 | |
| Letter from Dunlop Rubber Co. Ltd. concerning tyre testing and wear. | 6th Jul 1936 | Box 157 \ 2 scan0018 | |
| Letter to Dunlop Rubber Co. Ltd. regarding a complaint about tyre types and wear. | 7th Jul 1936 | Box 157 \ 2 scan0019 | |
| Correspondence from Dunlop regarding the location of four wheels and tyres, with a handwritten internal note clarifying their status. | 8th Jul 1936 | Box 157 \ 2 scan0020 | |
| Letter to Dunlop Rubber Co. Ltd. clarifying a misunderstanding about returned tyres. | 10th Jul 1936 | Box 157 \ 2 scan0021 | |
| Letter from Dunlop discussing tyre cornering tests and the effects of rim width and pressure. | 11th Aug 1936 | Box 157 \ 2 scan0022 | |
| Letter to Dunlop Rubber Co. Ltd. discussing tyre and rim tests for cornering power. | 12th Aug 1936 | Box 157 \ 2 scan0023 | |
| Letter requesting to see test curves for a 5' Phantom III rim. | 12th Aug 1936 | Box 157 \ 2 scan0024 | |
| Letter to Dunlop Rubber Co. Ltd. concerning the results of tyre noise tests between Goodyear and Dunlop tyres. | 14th Aug 1936 | Box 157 \ 2 scan0025 | |
| Letter from Dunlop Rubber Co. regarding proposed tyre and rim width experiments. | 14th Aug 1936 | Box 157 \ 2 scan0026 | |
| Official order to be placed with Messrs. Dunlop for 15 Balance Weight Bases. | 16th Jul 1936 | Box 157 \ 2 scan0027 | |
| Letter to Dunlop Ltd. requesting a supply of 15 balance weight bases for standard Bentley wheels. | 16th Jul 1936 | Box 157 \ 2 scan0028 | |
| Letter from Dunlop Rubber Co. Ltd. confirming a matter has been connected with their factory. | 16th Jul 1936 | Box 157 \ 2 scan0029 | |
| Tyre noise on the Phantom III model, comparing Dunlop and Goodyear tyres. | 17th Aug 1936 | Box 157 \ 2 scan0030 | |
| Comparing the noise and wear of Dunlop and Goodyear tyres on a Phantom III car. | 17th Aug 1936 | Box 157 \ 2 scan0031 | |
| Letter to Dunlop Rubber Co. Ltd. regarding a dimensional issue with wide rim wheels for the Phantom III. | 18th Aug 1936 | Box 157 \ 2 scan0032 | |
| Letter to Dunlop Rubber Co. enquiring about available tyre sizes for Citroen '40' rims. | 20th Aug 1936 | Box 157 \ 2 scan0033 | |
| Letter to Dunlop Tyre & Rubber Co. Ltd. regarding a temporary order for Michelin tyres for Citroen rims. | 22th Aug 1936 | Box 157 \ 2 scan0034 | |
| Letter from Dunlop Rubber Co. Ltd. confirming receipt of a sample wheel and noting a dimensional discrepancy. | 25th Aug 1936 | Box 157 \ 2 scan0035 | |
| Letter from Dunlop Rubber Co. Ltd. regarding a demonstration to compare the noise of worn versus new tyres. | 27th Aug 1936 | Box 157 \ 2 scan0036 | |
| Letter to Dunlop Rubber Co. Ltd. arranging a tyre demonstration to address noise issues. | 31th Aug 1936 | Box 157 \ 2 scan0037 | |
| Letter from F.G.W. King of Dunlop Rubber to G.H. Whyman regarding the rescheduling of a visit. | 2nd Sep 1936 | Box 157 \ 2 scan0038 | |
| Recommendation for Bentley front tyre pressures to improve handling. | 18th Sep 1936 | Box 157 \ 2 scan0039 | |
| Recommendation to set the front tyre pressure to 30 lbs/sq.in. for the 25/30 HP model. | 18th Sep 1936 | Box 157 \ 2 scan0040 | |
| Letter to Dunlop Rubber Co. Ltd. arranging co-operation for tests on tyre noise and groans in London traffic. | 19th Sep 1936 | Box 157 \ 2 scan0041 | |
| Tyre noise tests for the Phantom III, comparing Dunlop and Goodyear tyres and the effects of rubber insulating bushes. | 30th Sep 1936 | Box 157 \ 2 scan0042 | |
| Letter to Dunlop Tyre & Rubber Co. regarding worn dynamometer tyres for a Phantom III chassis and a request for re-treading information. | 2nd Oct 1936 | Box 157 \ 2 scan0043 | |
| Letter from Dunlop Rubber Co. Ltd. regarding the continued use and potential replacement of worn solid tyres on a dynamometer test machine. | 6th Oct 1936 | Box 157 \ 2 scan0044 | |
| Letter from Dunlop Rubber Co. Ltd. proposing special lightweight 5.00 x 18 rims for the Phantom III model. | 6th Oct 1936 | Box 157 \ 2 scan0045 | |
| Letter to The Dunlop Rubber Co. Ltd. regarding a potential typing error in wheel weight and a request for cost estimates for light alloy rims. | 8th Oct 1936 | Box 157 \ 2 scan0046 | |
| Letter from Dunlop Rubber Co. Ltd. regarding the preparation of costs for lightweight 5.00 x 18 rims. | 9th Oct 1936 | Box 157 \ 2 scan0047 | |
| Letter from Dunlop Rubber Co. Ltd. discussing test results on tyre cornering force and rim width. | 10th Oct 1936 | Box 157 \ 2 scan0048 | |
| Letter from Dunlop Rubber Co. Ltd. concerning figures for 15° slip and cornering force. | 10th Oct 1936 | Box 157 \ 2 scan0049 | |
| Graph illustrating the variation of cornering force with different rim widths for various tyres on a dry concrete surface. | 26th Jun 1936 | Box 157 \ 2 scan0050 | |
| Graph showing the relationship between slip angle and lateral force. | 26th Jun 1936 | Box 157 \ 2 scan0051 | |
| Letter to Dunlop Rubber requesting further data on tyre cornering power and vertical deflection rates. | 19th Oct 1936 | Box 157 \ 2 scan0052 | |
| Letter from Dunlop Rubber Co. Ltd. providing comparative weights of Wire and Spoked Disc wheels. | 14th Oct 1936 | Box 157 \ 2 scan0053 | |
| Letter from Dunlop comparing the weights of Magna Wire Wheels and Spoked Disc wheels. | 14th Oct 1936 | Box 157 \ 2 scan0054 | |
| Letter from Dunlop regarding the supply of experimental Hiduminium Rims. | 14th Oct 1936 | Box 157 \ 2 scan0055 | |
| Letter from Dunlop Rubber Co. Ltd. concerning the production, timeline and tooling costs for 10-gauge light steel rims and existing 5.00x18 rims. | 15th Oct 1936 | Box 157 \ 2 scan0056 | |
| Letter to Dunlop Rubber Co. Ltd. regarding the delivery of light alloy rims and information on wheel weights. | 15th Oct 1936 | Box 157 \ 2 scan0057 | |
| To Roy regarding the £100 tool cost quoted by Dunlop for producing experimental wide rims for the Phantom III. | 16th Oct 1936 | Box 157 \ 2 scan0058 | |
| Letter from Dunlop detailing the weights of various rim designs for Bentley and Rolls 25/30 chassis. | 26th Oct 1936 | Box 157 \ 2 scan0059 | |
| Letter from Dunlop Rubber Co. Ltd. concerning 10 gauge rims for the Phantom III and American rim construction. | 26th Oct 1936 | Box 157 \ 2 scan0060 | |
| Letter to The Dunlop Rubber Co. Ltd. inquiring about performance data for lighter P3 5' rims. | 27th Oct 1936 | Box 157 \ 2 scan0061 | |
| Letter from Dunlop Rubber Co. Ltd. concerning the specifications and performance of improvised wheels and rims. | 29th Oct 1936 | Box 157 \ 2 scan0062 | |
| Letter to Dunlop Rubber Co. Ltd. providing rim section data for various Buick models. | 30th Oct 1936 | Box 157 \ 2 scan0063 | |
| Letter to Dunlop requesting tyre cornering power data and inquiring about tyres for independent suspension. | 31th Oct 1936 | Box 157 \ 2 scan0064 | |
| Letter from Dunlop Rubber Co. concerning the delayed dispatch of a set of five Bentley wheels with Hiduminium rims. | 3rd Nov 1936 | Box 157 \ 2 scan0065 | |
| Letter from Dunlop Rubber Co. Ltd. concerning tyre cornering power and deflection tests. | 4th Nov 1936 | Box 157 \ 2 scan0066 | |
| Letter to Messrs. Dunlop & Co. Ltd. regarding the dispatch of a 6 x 17 India cover on loan. | 5th Nov 1936 | Box 157 \ 2 scan0067 | |
| Request to despatch one 6 x 17 India tyre to Messrs Dunlop & Co. Ltd. in Birmingham. | 5th Nov 1936 | Box 157 \ 2 scan0068 | |
| Letter from Dunlop Rubber Co. Ltd. concerning rim fitment on Buick models and the material gauges of tyres. | 5th Nov 1936 | Box 157 \ 2 scan0069 | |
| Letter from the Experimental Department to Dunlop Rubber Co., Ltd. regarding the measurement of cornering power for an India Dunlop 90 tyre. | 5th Nov 1936 | Box 157 \ 2 scan0070 | |
| Letter to the Dunlop Rubber Co. to arrange a visit to discuss wide rim experiments and faulty hubs. | 10th Nov 1936 | Box 157 \ 2 scan0071 | |
| Order for 15 - 5 X 18 wheels from Dunlops for experimental cars. | 13th Nov 1936 | Box 157 \ 2 scan0072 | |
| Letter from Dunlop Rubber Co. Ltd. regarding Centre Lock wheels, axle types, and potential weight savings for a Bentley chassis. | 16th Nov 1936 | Box 157 \ 2 scan0073 | |
| Letter from Dunlop Rubber Co. Ltd. regarding the manufacture of 5.00x17 72.V wheels for a Bentley chassis. | 16th Nov 1936 | Box 157 \ 2 scan0074 | |
| Letter from Dunlop Rubber Co. regarding their inability to manufacture specific Michelin wheels and their search for alternative suppliers. | 18th Nov 1936 | Box 157 \ 2 scan0075 | |
| Letter from Dunlop discussing arrangements for the inspection and costing of solid dynamometer test tyres. | 18th Nov 1936 | Box 157 \ 2 scan0076 | |
| Letter to Dunlop Rubber Co., Ltd. regarding a sketch for new 5 x 17 wheels and tyre clearance. | 18th Nov 1936 | Box 157 \ 2 scan0077 | |
| The despatch of two dynamometer wheels with solid tyres to The Dunlop Rubber Co. Ltd. | 19th Nov 1936 | Box 157 \ 2 scan0078 | |
| Letter to Dunlop Rubber Co. Ltd. regarding the despatch of two dynamometer wheels for inspection. | 19th Nov 1936 | Box 157 \ 2 scan0079 | |
| Letter from Dunlop Rubber Co. Ltd. regarding the receipt and processing of two dynamometer wheels. | 23th Nov 1936 | Box 157 \ 2 scan0080 | |
| Letter from Dunlop Rubber Co. Ltd. regarding a new wheel track alteration and production details. | 23th Nov 1936 | Box 157 \ 2 scan0081 | |
| Letter to Dunlop Rim & Wheel Co. requesting wheels for an experimental chassis, referencing two different drawing numbers. | 24th Nov 1936 | Box 157 \ 2 scan0082 | |
| Letter from Dunlop discussing tyre cushioning capacity, cornering forces, and the effects of rim width and inflation pressure. | 27th Nov 1936 | Box 157 \ 2 scan0083 | |
| Letter from Dunlop Rubber Co. Ltd. discussing axle camber settings and cornering force tests. | 1st Nov 1936 | Box 157 \ 2 scan0084 | |
| Graph showing the cushioning capacity of a 6.00-16 Fort '90' tyre at various inflation pressures and rim widths. | 1st Nov 1936 | Box 157 \ 2 scan0085 | |
| Letter to Dunlop Rubber Co. Ltd. discussing tyre cornering power, rim width, and planned tests on a Phantom III. | 1st Dec 1936 | Box 157 \ 2 scan0086 | |
| Letter from Dunlop Rubber Co. Ltd. to W. A. Robotham concerning the examination of tyres and a congratulatory note on a promotion. | 5th Dec 1936 | Box 157 \ 2 scan0087 | |
| Letter to Dunlop Rubber Co. regarding complaints of noisy silent tread tyres on the 25/30 model. | 2nd Dec 1936 | Box 157 \ 2 scan0088 | |
| Letter to Dunlop Rubber Co. Ltd. enquiring about tyre safety and standardisation for a Bentley. | 7th Dec 1936 | Box 157 \ 2 scan0089 | |
| Letter from Dunlop Rubber Co. regarding the delivery and fitting of tyres to Bentley wheels. | 8th Dec 1936 | Box 157 \ 2 scan0090 | |
| Letter from Dunlop regarding a misunderstanding about the suitability of 6.00-17 tyres for a chassis. | 8th Dec 1936 | Box 157 \ 2 scan0091 | |
| Letter from Dunlop Rubber Co. Ltd. regarding tooling for wheel production. | 8th Dec 1936 | Box 157 \ 2 scan0092 | |
| Letter from Dunlop Rubber Co. to W.A. Robotham regarding the examination of returned tyres and arranging a meeting. | 10th Dec 1936 | Box 157 \ 2 scan0093 | |
| Letter to Dunlop Rubber Co., Ltd. regarding a meeting to discuss Dominion Centipede Tread Tyres. | 11th Dec 1936 | Box 157 \ 2 scan0094 | |
| Letter from Dunlop Rubber Co. Ltd. regarding the development and pricing of a commercial vehicle disc wheel. | 14th Dec 1936 | Box 157 \ 2 scan0095 | |
| Letter from Dunlop Rubber Co. Ltd. concerning tyre and rim width tests, including for a Phantom III car. | 14th Dec 1936 | Box 157 \ 2 scan0096 | |
| Letter from Dunlop Rubber Co. Ltd. inquiring about the road testing status of Hiduminium Bentley wheels. | 14th Dec 1936 | Box 157 \ 2 scan0097 | |
| Letter from Dunlop Rubber Co. regarding a delay in the delivery of special wheels. | 15th Dec 1936 | Box 157 \ 2 scan0098 | |
| Letter from Dunlop regarding a customer complaint of rapid tyre wear and difficulty in tracing the contact. | 15th Dec 1936 | Box 157 \ 2 scan0099 | |
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