| Description | Date | Identifier | |
| Letter recommending a change in axle gear ratio for Phantom chassis exported to America to improve low-speed performance. | 10th Feb 1926 | Box 72 \ 2 scan0067 | |
| And approving the axle ratio for Phantom chassis intended for the American market. | 25th Feb 1926 | Box 72 \ 2 scan0068 | |
| Establishment of road-spring standards for the Phantom by weighing imported cars. | 15th Mar 1928 | Box 72 \ 2 scan0069 | |
| Request to weigh the next half dozen chassis and record their weights and wheelbase lengths. | 15th Mar 1928 | Box 72 \ 2 scan0070 | |
| Letter detailing the findings from an examination of a cylinder head from car 12-MC, including rust, thickness, and proposed design changes. | 7th May 1926 | Box 72 \ 2 scan0071 | |
| Letter discussing testing the effects of saline waters and anti-freeze solutions on an aluminum head alloy. | 7th May 1928 | Box 72 \ 2 scan0072 | |
| Hand-drawn sketch illustrating a fluid transfer or siphon system. | 7th May 1928 | Box 72 \ 2 scan0073 | |
| Table of specifications for New Phantom models in the U.S.A., listing chassis numbers, body weights, passenger capacity, and spring data. | 7th May 1928 | Box 72 \ 2 scan0074 | |
| Chassis specification sheet detailing body weight, passenger capacity, and spring settings. | 1st Jun 1926 | Box 72 \ 2 scan0075 | |
| The reversal of a decision to fit 14-tooth axles on Phantom models for the U.S.A. | 1st Jun 1926 | Box 72 \ 2 scan0076 | |
| New Phantom complaint from America and related correspondence. | 16th Jul 1926 | Box 72 \ 2 scan0077 | |
| Successful launch of the Phantom with left-hand steering by the American branch. | 21th Sep 1926 | Box 72 \ 2 scan0078 | |
| Letter from the Chairman of Rolls-Royce of America to Rolls-Royce Ltd. regarding the new 'Phantom' model's production, pricing, and sales strategy. | 8th Sep 1926 | Box 72 \ 2 scan0079 | |
| Steering and silencer issues on the Phantom model in the U.S.A. | 14th Jul 1927 | Box 72 \ 2 scan0080 | |
| Steering difficulties on the Springfield Chassis, particularly with the introduction of low-pressure tyres. | 8th Aug 1927 | Box 72 \ 2 scan0081 | |
| Remedies for clanking in the brake mechanism and banging in the exhaust. | 8th Aug 1927 | Box 72 \ 2 scan0082 | |
| Continued discussion on the benefits of an engine governor and roller bearing throttle. | 21th Jul 1928 | Box 72 \ 2 scan0083 | |
| Reports on American-built Springfield Silver Ghost and Phantom cars. | 21th Jul 1928 | Box 72 \ 2 scan0084 | |
| American chassis, detailing observations on its gears, admirable features, and engine performance. | 22th Jul 1928 | Box 72 \ 2 scan0085 | |
| Continuation of a report evaluating vehicle components including the engine, steering, brakes, and axle. | 22th Jul 1928 | Box 72 \ 2 scan0086 | |
| The distribution board fuses and a conclusion regarding a loss of chassis quality and appearance. | 7th Feb 1928 | Box 72 \ 2 scan0087 | |
| Performance and component review of the American Phantom model. | 7th Feb 1928 | Box 72 \ 2 scan0088 | |
| Inspection report detailing features of a vehicle's carburetter, brakes, body, and other peculiarities. | 14th Nov 1928 | Box 72 \ 2 scan0089 | |
| New dynamometer power charts and a carburation fault observed at 1000 RPM during engine testing. | 14th Nov 1928 | Box 72 \ 2 scan0090 | |
| Manifold testing, horsepower measurement, and fuel consumption test procedures. | 13th Nov 1928 | Box 72 \ 2 scan0091 | |
| Chassis dynamometer chart plotting horsepower against dynamometer pull for various engine speeds. | 13th Nov 1928 | Box 72 \ 2 scan0092 | |
| Chassis-dynamometer chart plotting dynamometer pull against horsepower at various engine RPMs for a 14/52 axle. | 13th Nov 1928 | Box 72 \ 2 scan0093 | |
| Dynamometer power curve graph for engine 32C L. | 14th Nov 1918 | Box 72 \ 2 scan0094 | |
| Sub-frame chassis and steering specifications for a vehicle. | 12th Jun 1925 | Box 72 \ 2 scan0095 | |
| Secret memo detailing modifications for a new car being prepared for Mr. Royce. | 1st Jun 1925 | Box 72 \ 2 scan0096 | |
| Secret memo regarding arrangements to conceal items on a chassis from coachbuilders. | 25th Jun 1925 | Box 72 \ 2 scan0097 | |
| Secret memo discussing the special features required for a Barker Allweather body on a New Phantom chassis for Mr. Royce. | 27th Jun 1925 | Box 72 \ 2 scan0098 | |
| Secret memo regarding the delivery of the 7-EX 'W' Series chassis for examination of new and experimental parts. | 30th Jun 1925 | Box 72 \ 2 scan0099 | |
| Telegram from 'Rover' to 'Hives' in Derby requesting a Phantom chassis for the weekend. | 1st Jul 1925 | Box 72 \ 2 scan0100 | |
| Letter confirming the decision to send a chassis to Barker coachbuilders for a special all-weather car for Mr. Royce. | 1st Jul 1925 | Box 72 \ 2 scan0101 | |
| Telegram concerning travel and delivery arrangements for a chassis. | 2nd Jul 1925 | Box 72 \ 2 scan0102 | |
| New parts fitted to vehicle 7.EX, detailing changes, weight savings, and design observations. | 3rd Jul 1925 | Box 72 \ 2 scan0103 | |
| List of vehicle component specifications and modifications, page 2. | 3rd Jul 1925 | Box 72 \ 2 scan0104 | |
| List of new parts yet to be fitted to a vehicle, including a side lever mechanism, headlamps, and flywheel. | 6th Jul 1925 | Box 72 \ 2 scan0105 | |
| Arranging an inspection of the 7-EX car chassis and noting it is not a model car for running. | 6th Jul 1925 | Box 72 \ 2 scan0106 | |
| Suggesting modifications to a car's bonnet and radiator line following criticism from Mr. Royce. | 7th Jun 1925 | Box 72 \ 2 scan0107 | |
| Fitting an aluminium induction system, water heating, and improved tappet lubrication to a 7-EX car chassis. | 7th Jul 1925 | Box 72 \ 2 scan0108 | |
| The design and issues of a new wider dash and louvred bonnet. | 1st Jul 1925 | Box 72 \ 2 scan0109 | |
| Modifications to the radiator, luggage grid, and gearbox. | 6th Jul 1925 | Box 72 \ 2 scan0110 | |
| Vehicle components, including the petrol tank, instrument panel, and autovac tank. | 25th Sep 1924 | Box 72 \ 2 scan0111 | |
| Modifications to tank capacity, brake covers, throttle control, and other new parts. | 1st Jul 1925 | Box 72 \ 2 scan0112 | |
| Secret memo outlining objections to a proposal for a Barker Allweather car body for Mr. Royce to be mounted by Holmes & Sanderson. | 7th Jul 1925 | Box 72 \ 2 scan0113 | |
| Poor quality of painting from coachbuilder Messrs Barkers and a proposal to send them a standard chassis. | 7th Jul 1925 | Box 72 \ 2 scan0114 | |
| Modifications for chassis 7-EX. | 9th Jul 1925 | Box 72 \ 2 scan0115 | |
| Modifications to the Autovac tank and wheel carrier. | 9th Jul 1925 | Box 72 \ 2 scan0116 | |
| Confidentiality and chassis modifications for a new 'Phantom' model, particularly a car for Mr. Royce. | 9th Jul 1925 | Box 72 \ 2 scan0117 | |
| Secrecy around a modified chassis for Mr. Royce's car being sent to the coachbuilder Barkers. | 17th Sep 1925 | Box 72 \ 2 scan0118 | |
| Covering memo regarding the appearance and finish of the 'New Phantom' chassis. | 11th Jul 1925 | Box 72 \ 2 scan0119 | |
| Points regarding the appearance and finish of the 'New Phantom' chassis. | 7th Jul 1925 | Box 72 \ 2 scan0120 | |
| List of required improvements and design changes for a car chassis, with corresponding responses and actions. | 9th Jul 1925 | Box 72 \ 2 scan0121 | |
| Part differences on the 'New Phantom' chassis No. 7-EX, with remarks and inspection notes. | 9th Jul 1925 | Box 72 \ 2 scan0122 | |
| Technical report discussing improvements to tappet lubrication, bonnet and dash dimensions, and bonnet catches. | 9th Jul 1925 | Box 72 \ 2 scan0123 | |
| List of technical points and comments regarding bonnet and radiator components. | 9th Jul 1925 | Box 72 \ 2 scan0124 | |
| Technical notes and feedback on the design of radiator shutters, a luggage grid, and the gearbox mechanism. | 9th Jul 1925 | Box 72 \ 2 scan0125 | |
| Design flaws and suggestions for the petrol tank and related components. | 9th Jul 1925 | Box 72 \ 2 scan0126 | |
| Design feedback and proposed changes for vehicle components like the petrol tank, level indicator, and instrument panel. | 9th Jul 1925 | Box 72 \ 2 scan0127 | |
| Engineering notes and feedback on vehicle components including the Autovac tank, rear brakes, throttle, and instrument panel layout. | 9th Jul 1925 | Box 72 \ 2 scan0128 | |
| List of modifications and new parts to be fitted to a car, with associated comments. | 1st Jul 1925 | Box 72 \ 2 scan0129 | |
| Secret internal memo justifying the sending of the 7-EX car for examination and discussing bonnet and radiator design. | 1st Jul 1925 | Box 72 \ 2 scan0130 | |
| Hold-up of work on radiators, dashboards, and bonnets for 'W' and 'X' series vehicles. | 1st Jul 1925 | Box 72 \ 2 scan0131 | |
| Specification list for the 7.EX 'W' Series chassis placed on test in June 1925. | 16th Jul 1925 | Box 72 \ 2 scan0132 | |
| List of vehicle component specifications and their corresponding drawing or part numbers. | 16th Jul 1925 | Box 72 \ 2 scan0133 | |
| List of chassis components and fittings with corresponding part and specification numbers. | 16th Jul 1925 | Box 72 \ 2 scan0134 | |
| List of vehicle components and their corresponding arrangement drawing numbers. | 16th Jul 1925 | Box 72 \ 2 scan0135 | |
| List of modifications for unit 4.EAC.II, which is fitted in a 7.EX Chassis. | 16th Jul 1925 | Box 72 \ 2 scan0136 | |
| List of components and associated part numbers for the 4.EAC.II unit. | 17th Jul 1925 | Box 72 \ 2 scan0137 | |
| Modifications and seeking instructions for Mr. Royce's car (7-EX), regarding the radiator, bonnet, and wing irons. | 17th Jul 1925 | Box 72 \ 2 scan0138 | |
| Secret memo detailing preparations for a special chassis (7-EX) for Mr. Royce's all-weather body. | 1st Jul 1925 | Box 72 \ 2 scan0139 | |
| Secret memo detailing modifications to chassis 7/EX, a New Phantom, for Mr. Royce's personal car. | 21th Jul 1925 | Box 72 \ 2 scan0140 | |
| Design specifications and modifications for a car chassis, including bonnet, steering, and controls. | 21th Jul 1925 | Box 72 \ 2 scan0141 | |
| Mr. Royce's instructions to prioritize quality over speed for a chassis build. | 24th Jul 1925 | Box 72 \ 2 scan0142 | |
| Pressing for the adoption of three recent steering improvements for the 7-EX car. | 24th Jul 1925 | Box 72 \ 2 scan0143 | |
| Arrangements for chassis 7 EX destined for Mr Royce. | 6th Aug 1925 | Box 72 \ 2 scan0144 | |
| Inquiring about the availability of the E.A.C. car used by Mr. Royce. | 24th Aug 1925 | Box 72 \ 2 scan0145 | |
| Extended use of the EAC car by Mr. Royce, anticipating a further 7 to 8 weeks. | 1st Aug 1925 | Box 72 \ 2 scan0146 | |
| List of 22 modifications or part specifications, with corresponding reference and scheme numbers. | 11th Sep 1925 | Box 72 \ 2 scan0147 | |
| List of numbered modifications to various components, page 2. | 28th Sep 1925 | Box 72 \ 2 scan0148 | |
| Complete specification for the 7.EX.-Short type Chassis (D type). | 28th Sep 1925 | Box 72 \ 2 scan0149 | |
| List of specifications and modifications for various vehicle components. | 25th Sep 1925 | Box 72 \ 2 scan0150 | |
| List of modifications and updates to various automotive components with associated reference codes. | 25th Sep 1925 | Box 72 \ 2 scan0151 | |
| List of vehicle component modifications and their corresponding reference numbers. | 25th Sep 1925 | Box 72 \ 2 scan0152 | |
| Updates to an Engine Coupling and Self Starter Gear. | 25th Sep 1925 | Box 72 \ 2 scan0153 | |
| List of components and specifications for the 4.EAC.II Unit fitted in a 7.EX Chassis. | 25th Sep 1925 | Box 72 \ 2 scan0154 | |
| List of engine component modifications and their corresponding reference numbers. | 25th Sep 1925 | Box 72 \ 2 scan0155 | |
| List of part numbers with names and their corresponding List of Parts (L.O.P.) references. | 25th Sep 1925 | Box 72 \ 2 scan0156 | |
| Technical list of electrical parts and their associated reference numbers. | 25th Sep 1925 | Box 72 \ 2 scan0157 | |
| List of required work to be carried out on the 7-EX chassis. | 26th Sep 1925 | Box 72 \ 2 scan0158 | |
| Confirming the delivery of Mr. Royce's experimental car (7-EX) to Messrs. Barkers. | 14th Oct 1925 | Box 72 \ 2 scan0159 | |
| The delayed delivery of a Newphantom car chassis to the coachbuilders. | 15th Oct 1925 | Box 72 \ 2 scan0160 | |
| List of new features fitted to chassis RE 7.EX, which passed to test on October 12th, 1925. | 15th Oct 1925 | Box 72 \ 2 scan0161 | |
| Methods for a crankshaft and controls for a 4.EAC.II unit. | 15th Oct 1925 | Box 72 \ 2 scan0162 | |
| Supplying accessories for Mr. Royce's car and the status of an instrument patch. | 7th Nov 1925 | Box 72 \ 2 scan0163 | |
| Fitting of parts to Mr. Royce's 7-EX car by Messrs. Barkers. | 11th Nov 1925 | Box 72 \ 2 scan0164 | |
| Letter to Barker & Co. Ltd. requesting access to chassis 7-EX for mechanical testing before the final coat of varnish is applied. | 20th Nov 1925 | Box 72 \ 2 scan0165 | |
| Confirmation of a wire concerning the availability of seven EX. | 27th Nov 1925 | Box 72 \ 2 scan0166 | |
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