| Description | Date | Identifier | |
| Correspondence from Melbourne regarding front spring breakages on 20 HP chasses and customer treatment policy. | 19th Apr 1929 | Box 47 \ 5 Scan259 | |
| Concluding page of a memorandum from Melbourne, with a postscript referring to a previous memo. | 19th Apr 1929 | Box 47 \ 5 Scan260 | |
| Customer's complaint regarding tyre comfort and the subsequent investigation. | 26th Jun 1929 | Box 47 \ 5 Scan261 | |
| Pamphlet for customers regarding lower tyre pressures for 20-HP light cars. | 26th Jun 1929 | Box 47 \ 5 Scan262 | |
| Shock absorber knocks and repairs on 20 HP and 40/50 HP models. | 3rd Jul 1929 | Box 47 \ 5 Scan263 | |
| Request to test a worm-driven jack from the Dunlop Rubber Co. and to reply to a query about its handle. | 21th Nov 1923 | Box 48 \ 1 Scan001 | |
| Copy of a letter from The Dunlop Rubber Co. regarding the supply of a special worm-driven jack. | 19th Nov 1923 | Box 48 \ 1 Scan002 | |
| The testing of a sample Dunlop Worm Driven Jack and the decision to adopt them as standard. | 11th Dec 1923 | Box 48 \ 1 Scan003 | |
| Sending of two sample Dunlop jacks for testing. | 18th Dec 1923 | Box 48 \ 1 Scan004 | |
| Chasing a report on jacks submitted by the Dunlop Co. | 10th Jan 1924 | Box 48 \ 1 Scan005 | |
| Request for a report on Dunlop Jacks prior to placing further production orders. | 2nd Feb 1924 | Box 48 \ 1 Scan006 | |
| Query about sourcing Dunlop Jacks due to difficulty obtaining adequate supplies of Michelin Jacks from France. | 16th Apr 1924 | Box 48 \ 1 Scan007 | |
| Comparison of Michelin and Dunlop jacks, outlining dissatisfaction with Dunlop models and specifying required ranges for 40/50 HP and 20 HP cars. | 17th Apr 1924 | Box 48 \ 1 Scan008 | |
| Modifications and design improvements for a Dunlop Jack. | 13th Dec 1924 | Box 48 \ 1 Scan009 | |
| The performance and limitations of a Dunlop Jack for Balloon Tyres. | 1st Dec 1924 | Box 48 \ 1 Scan010 | |
| Modified Dunlop Jack for trial. | 2nd Mar 1926 | Box 48 \ 1 Scan011 | |
| Sending a double lifting jack with a ball bearing for testing and a potential lighter handle. | 26th Jan 1926 | Box 48 \ 1 Scan012 | |
| The delivery and review of a Dunlop 'High Lift' Jack. | 3rd Jul 1926 | Box 48 \ 1 Scan013 | |
| Letter from Dunlop Rubber Co. Ltd. concerning the design and features of a new 'High Lift Jack'. | 30th Jun 1926 | Box 48 \ 1 Scan014 | |
| Letter from Dunlop Rubber Co. Ltd. regarding a quotation and a meeting. | 20th Sep 1926 | Box 48 \ 1 Scan015 | |
| The urgent need to source a suitable jack for the Phantom chassis. | 20th Sep 1926 | Box 48 \ 1 Scan016 | |
| Communications with Dunlop Rubber Co. about the availability of a jack for the 'Phantom' chassis. | 27th Sep 1926 | Box 48 \ 1 Scan017 | |
| Correspondence regarding the procurement of a suitable jack from the Dunlop Rubber Co. for the 'Phantom' Chassis. | 5th Oct 1926 | Box 48 \ 1 Scan018 | |
| Letter from Dunlop Rubber regarding the supply and delivery of jacks for a 40/50 HP chassis. | 4th Oct 1926 | Box 48 \ 1 Scan019 | |
| The unsuitability of Dunlop jacks for the Phantom chassis and the alternative of sourcing them from Michelin. | 9th Oct 1926 | Box 48 \ 1 Scan020 | |
| Modification to a jack, replacing a hardened steel washer with a phosphor bronze one to prevent failure. | 4th Jan 1927 | Box 48 \ 1 Scan021 | |
| Blueprint cross-section of a Dunlop Double Lift Jack with handwritten annotations. | 9th Feb 1927 | Box 48 \ 1 Scan022 | |
| Test report and analysis of a Dunlop Jack, detailing its dimensions, failures, and potential improvements. | 1st Feb 1927 | Box 48 \ 1 Scan023 | |
| Modifications to the Dunlop jack, including adding jack pads or increasing its base height. | 1st Feb 1927 | Box 48 \ 1 Scan024 | |
| Confirming the suitability of the latest Dunlop wheel jack for the 20 HP chassis. | 18th May 1927 | Box 48 \ 1 Scan025 | |
| Instructing the Experimental Department to test a scheme for a rear axle jack pad. | 25th May 1927 | Box 48 \ 1 Scan026 | |
| Fitting, testing, and recommended standardisation of jacking pads for the Phantom rear axle. | 26th May 1927 | Box 48 \ 1 Scan027 | |
| Blueprint detailing the position and angles for a brazed jack pad on a flanged component. | 9th Jun 1927 | Box 48 \ 1 Scan028 | |
| Analysis of a damaged Dunlop Jack, identifying over-winding as the cause and proposing modifications. | 9th Jun 1927 | Box 48 \ 1 Scan029 | |
| Failure of a Dunlop Jack and suggestions for a new sample. | 10th Jun 1927 | Box 48 \ 1 Scan030 | |
| Standardisation of jack pads fitted to the rear axle to reduce difficulty in jacking. | 26th May 1927 | Box 48 \ 1 Scan031 | |
| Standardisation report detailing the fitting of a new part to a chassis, including test date and associated costs. | 1st Oct 1927 | Box 48 \ 1 Scan032 | |
| Letter to the Dunlop Rubber Company regarding an over-winding issue with a Double-Lift Jack for a Phantom car. | 6th Sep 1927 | Box 48 \ 1 Scan033 | |
| Letter detailing issues with a jack's fine screw and distorted thread, which is being returned dismantled for examination. | 6th Sep 1927 | Box 48 \ 1 Scan034 | |
| Despatch of a dismantled jack to Messrs. Dunlop, Birmingham. | 1st Sep 1927 | Box 48 \ 1 Scan035 | |
| Standardisation and cost of a new Dunlop road wheel jack for the Phantom model. | 28th Sep 1927 | Box 48 \ 1 Scan036 | |
| Standardisation of a new Dunlop jack for road wheels to suit low pressure tyres. | 8th Sep 1927 | Box 48 \ 1 Scan037 | |
| Standardisation form for chassis parts detailing implementation questions. | 1st Sep 1928 | Box 48 \ 1 Scan038 | |
| Evaluating a sample wheel jack from Tangye for 20 HP cars, with suggestions for improvement and an inquiry about a similar jack for 40/50 cars. | 1st Sep 1928 | Box 48 \ 1 Scan039 | |
| Continuation memo specifying load capacities and suggesting a Tangye's jack as a better alternative to the Dunlop jack. | 1st May 1929 | Box 48 \ 1 Scan040 | |
| Comparing a new Tangye jack against the existing Dunlop jack for the 40/50 HP chassis. | 1st May 1929 | Box 48 \ 1 Scan041 | |
| Alterations to a sample jack and sending it to sales for standardisation. | 23th Aug 1929 | Box 48 \ 1 Scan042 | |
| The supply of 'Tangye Jacks' for the 40/50 HP Chassis. | 23th Aug 1929 | Box 48 \ 1 Scan043 | |
| The failure of Dunlop Super D.L. Jacks due to a stripped thread in the cast iron barrel. | 18th Sep 1929 | Box 48 \ 1 Scan044 | |
| The quality control issues with a new supplier for wheel jacks for 20 HP cars. | 7th Oct 1929 | Box 48 \ 1 Scan045 | |
| Recommendation to cease ordering Tangye jacks and instead use improved Dunlop jacks for the 20 HP and Phantom II cars. | 24th Feb 1930 | Box 48 \ 1 Scan046 | |
| Design specifications and compromises for a suitable hydraulic jack. | 24th Feb 1930 | Box 48 \ 1 Scan047 | |
| The specifications and requirements for a new hydraulic car jacking system, referencing issues with existing jacks. | 14th May 1930 | Box 48 \ 1 Scan048 | |
| Test report on the new Dunlop Super Double Lift Jack. | 14th May 1930 | Box 48 \ 1 Scan049 | |
| The performance and potential improvement of a jack mechanism, comparing a new model to the standard Dunlop Jack. | 9th May 1930 | Box 48 \ 1 Scan050 | |
| Test report on the new Dunlop Super Double Lift Jack, recommending its production due to successful testing. | 21th May 1930 | Box 48 \ 1 Scan051 | |
| Standardisation sheet discussing an engine centre support for F.S. & M.S. engines and a Dunlop Super Double Lift Jack. | 2nd Jun 1930 | Box 48 \ 1 Scan052 | |
| Standardisation and required improvement of the Dunlop Super Double Lift Jack No. 10 due to a short bearing. | 4th Jun 1930 | Box 48 \ 1 Scan053 | |
| Standardisation test report for a Dunlop Super Double Lift Jack No. 10. | 21th May 1930 | Box 48 \ 1 Scan054 | |
| The selection and pricing of a suitable jack for the Peregrine. | 16th Nov 1932 | Box 48 \ 1 Scan055 | |
| Request to order six Dunlop Dome Type Jacks (D.L.5.) with specific T-type handles for evaluation. | 17th Nov 1932 | Box 48 \ 1 Scan056 | |
| Specification and test results for a Dunlop Jack for the Peregrine model. | 1st Dec 1932 | Box 48 \ 1 Scan057 | |
| Blueprint of a 5-inch DL Dome Jack. | 25th Nov 1932 | Box 48 \ 1 Scan058 | |
| Sample jacks for the Bentley chassis from the Dunlop Co. | 13th Dec 1933 | Box 48 \ 1 Scan059 | |
| Letter from Dunlop Rubber Co. Ltd. concerning the supply and specifications of three Dome type Jacks. | 11th Dec 1933 | Box 48 \ 1 Scan060 | |
| Letter from Dunlop Rubber Co. Ltd. discussing modifications and pricing for different types of jacks. | 15th Dec 1933 | Box 48 \ 1 Scan061 | |
| Test report and feedback on Dunlop Dome Jacks for the 3½ Litre Bentley Chassis. | 15th Dec 1933 | Box 48 \ 1 Scan062 | |
| Requesting the despatch of two Dome type jacks to the Dunlop Co. for experimental testing. | 15th Dec 1933 | Box 48 \ 1 Scan063 | |
| The testing of Dunlop dome jacks for the 3 1/2 Litre Bentley chassis. | 15th Dec 1933 | Box 48 \ 1 Scan064 | |
| Tests carried out on two sample Dunlop Dome Jacks for Bentley Cars. | 10th Jan 1934 | Box 48 \ 1 Scan065 | |
| The substitution of a Dunlop Dome Jack for Bentley cars. | 19th Jan 1934 | Box 48 \ 1 Scan066 | |
| Standardisation report for a modified Dunlop jack and handle. | 10th Jan 1934 | Box 48 \ 1 Scan067 | |
| Experimenting with a larger Mechanic Machine Co's universal joint on an EAC. 7 chassis. | 28th May 1925 | Box 48 \ 1 Scan068 | |
| The inspection of universal joints from the USA for Mr. Royce. | 25th Jun 1925 | Box 48 \ 1 Scan069 | |
| Receipt and inspection of Universal Joints from the Mechanic Machine Company, USA. | 4th Sep 1925 | Box 48 \ 1 Scan070 | |
| Requesting a report on Mechanic's Universal Joints from the USA and their potential fitment to various chassis models. | 16th Oct 1925 | Box 48 \ 1 Scan071 | |
| Forwarding a letter from Mechanics Machine Company requesting test results on universal joints. | 6th Nov 1925 | Box 48 \ 1 Scan072 | |
| The testing of universal joints supplied by the Mechanic's Machine Co., Rockford. | 7th Nov 1925 | Box 48 \ 1 Scan073 | |
| The fitting of a Mechanic's Universal Joint to a specific chassis. | 10th Nov 1925 | Box 48 \ 1 Scan074 | |
| Requesting information on a 'Mechanic's Joint' to respond to an offer from the manufacturing company. | 24th Dec 1925 | Box 48 \ 1 Scan075 | |
| The condition and lubrication of Mechanic's Joints after running 1623 miles. | 5th Jan 1926 | Box 48 \ 1 Scan076 | |
| Use of a large Mechanic's joint from the USA for the EAC.7 propeller shaft. | 1st Feb 1926 | Box 48 \ 1 Scan077 | |
| Recommendation from Mechanic's Machine Co. to use grease instead of oil in the sliding splined coupling on their universal joint. | 8th Feb 1926 | Box 48 \ 1 Scan078 | |
| Design, testing, and modification of a mechanic's joint for a propeller shaft. | 24th Feb 1926 | Box 48 \ 1 Scan079 | |
| Letter from R.A. Rothermel Ltd. following up on the test results for Mechanics Universal Joint sets. | 19th Mar 1926 | Box 48 \ 1 Scan080 | |
| Letter to Messrs. R.A. Rothermal Ltd. regarding the testing of Mechanic Universal Joints from the U.S.A. | 29th Mar 1926 | Box 48 \ 1 Scan081 | |
| Letter from R.A. Rothermel Ltd. acknowledging tests on Mechanics Universal Joints and requesting further reports. | 31th Mar 1926 | Box 48 \ 1 Scan082 | |
| Issues with torque tube control and advocating for a parallel control system for back axles and universal joints. | 21th Apr 1926 | Box 48 \ 1 Scan083 | |
| The performance of an American Mechanics Joint fitted to a 20 HP car propeller shaft over 14,215 miles. | 9th Nov 1926 | Box 48 \ 1 Scan084 | |
| Comparison of a cardan shaft joint with the American Mechanics Joint, highlighting the benefits of reduced lubrication. | 9th Nov 1926 | Box 48 \ 1 Scan085 | |
| Proposed 5' universal joint for use on EAC.10, comparing it to other designs and outlining adaptations. | 1st Jan 1928 | Box 48 \ 1 Scan086 | |
| Design and manufacturing of a propeller shaft universal joint, comparing it to a 'Mechanic's type'. | 25th Jan 1928 | Box 48 \ 1 Scan087 | |
| Modifications to a universal joint and propeller shaft for the India 3 model. | 28th Apr 1928 | Box 48 \ 1 Scan088 | |
| Knocking, wear, and lubrication issues concerning the 20HP Mechanic's Joints. | 31th Aug 1928 | Box 48 \ 1 Scan089 | |
| Modifications to the mechanic's joint for the propeller shaft for 20 HP and 40/50 HP models. | 28th Sep 1928 | Box 48 \ 1 Scan090 | |
| Standardisation sheet for Mechanics joints on the 20 HP model for the India 1V works. | 17th Dec 1928 | Box 48 \ 1 Scan091 | |
| Need and design for a test rig for mechanics joints. | 1st Feb 1929 | Box 48 \ 1 Scan092 | |
| Design and modification of Universal Mechanics Type Joints, noting issues with stiffness. | 13th Feb 1929 | Box 48 \ 1 Scan093 | |
| Standardisation of mechanics joints for a 20 HP car to improve transmission. | 17th Dec 1928 | Box 48 \ 1 Scan094 | |
| Instruction to change the jointing material for Mechanics Universal Joints from felt to chrome leather. | 15th Apr 1929 | Box 48 \ 1 Scan095 | |
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