| Description | Date | Identifier | |
| The performance of various vehicle components including the carburetter, oil cleaner, and damper. | 20th Jul 1930 | Box 11 \ 3 03-page222 | |
| 6,000-mile performance and condition report on the 24-EX experimental vehicle's Engine Unit No. 23. | 20th Jul 1930 | Box 11 \ 3 03-page223 | |
| Performance and issues of various engine components during testing. | 20th Jul 1930 | Box 11 \ 3 03-page224 | |
| Condition and performance report on various automotive components. | 20th Jul 1930 | Box 11 \ 3 03-page225 | |
| Servo mechanism lubrication issues and modifications, and the analysis of a failing clutch pressure plate. | 20th Jul 1930 | Box 11 \ 3 03-page226 | |
| Inspection report detailing the performance and condition of various vehicle components. | 20th Jul 1930 | Box 11 \ 3 03-page227 | |
| Technical report detailing observations and findings on a vehicle's steering tube, radiator, and bonnet. | 20th Jul 1930 | Box 11 \ 3 03-page228 | |
| Inspection report detailing the condition and lubrication of a starting handle, front axle, brakes, road springs, and hydraulic dampers. | 20th Jul 1930 | Box 11 \ 3 03-page229 | |
| The condition of vehicle components including the rear axle, brakes, springs, propeller shaft, and carburettor. | 20th Jul 1930 | Box 11 \ 3 03-page230 | |
| The performance and modifications of a carburetter, autovac, inlet pipes, and ignition plugs. | 20th Jul 1930 | Box 11 \ 3 03-page231 | |
| The condition and performance of ignition cables, exhaust, lubrication, battery, and petrol tank components. | 20th Jul 1930 | Box 11 \ 3 03-page232 | |
| Performance and condition of various components including the horn, sub-frame, wings, frame ties, and undersheets. | 20th Jul 1930 | Box 11 \ 3 03-page233 | |
| Test report on the spare wheel carrier, bumpers, dynamo, starter motor, and automatic switch. | 20th Jul 1930 | Box 11 \ 3 03-page234 | |
| Condition report on various vehicle components including the ignition system, lamps, and bodywork, with a list of lubricants used. | 20th Jul 1930 | Box 11 \ 3 03-page235 | |
| Summary of a vehicle's performance metrics and weight specifications. | 20th Jul 1930 | Box 11 \ 3 03-page236 | |
| New spring plate for the 24-EX model and a proposition for improving the cooling system. | 20th Jul 1930 | Box 11 \ 3 03-page237 | |
| Vehicle component testing, covering cooling, temperatures, exhaust, clutch, and the gearbox undershield. | 20th Jul 1930 | Box 11 \ 3 03-page238 | |
| The effects of removing an expensive but valueless component after wet weather testing. | 18th Jul 1930 | Box 11 \ 3 03-page239 | |
| Diagram illustrating the failure of a front cast iron pressure plate, noting crack locations and measurements. | 18th Jul 1930 | Box 11 \ 3 03-page240 | |
| Letter from Châteauroux, France, requesting arrangements for a car and reports during the upcoming works holiday. | 20th Jul 1930 | Box 11 \ 3 03-page241 | |
| Letter discussing cooling performance reports for a 24-EX car and proposed modifications. | 21th Jul 1930 | Box 11 \ 3 03-page242 | |
| Wheel track modifications, a car test in France, and a fix for radiator water loss. | 22th Jul 1930 | Box 11 \ 3 03-page243 | |
| Investigation into the cause of water loss from a new radiator on the 25-EX model. | 22th Jul 1930 | Box 11 \ 3 03-page244 | |
| Radiator water loss due to vehicle pitching and proposed solutions including baffling steam pipes. | 22th Jul 1930 | Box 11 \ 3 03-page245 | |
| Page 3 of a continued document regarding the difficulty of fitting a baffle to a car's radiator. | 22th Jul 1930 | Box 11 \ 3 03-page246 | |
| The loss of water from a new shallow top tank radiator fitted to car 24-EX. | 22th Jul 1930 | Box 11 \ 3 03-page247 | |
| Extract from a report on the necessity of the gearbox undershield and suggesting it could be removed to save manufacturing costs. | 23th Jul 1930 | Box 11 \ 3 03-page248 | |
| Failed cast iron clutch pressure plate in a Phantom II car, leading to plans for destructive testing of a new design. | 23th Jul 1930 | Box 11 \ 3 03-page249 | |
| Blueprint of a pressure plate for a starter, differentiating between track and hand starter versions. | 28th Jul 1930 | Box 11 \ 3 03-page250 | |
| Confirming the receipt of a clutch pressure plate. | 23th Jul 1930 | Box 11 \ 3 03-page251 | |
| Letter discussing vehicle part replacements, tests, and travel arrangements for a meeting. | 23th Jul 1930 | Box 11 \ 3 03-page252 | |
| Quoting Hancock's report regarding a chart showing water and air temperature variations during a 250-mile run. | 23th Jul 1930 | Box 11 \ 3 03-page253 | |
| Line graph of water and air temperature readings taken every 50 miles over several days. | 16th Jul 1930 | Box 11 \ 3 03-page254 | |
| Post Office Telegraph communication regarding personnel. | 25th Jun 1940 | Box 11 \ 3 03-page255 | |
| Testing a washer with holes to reduce water loss from the radiator. | 27th Jul 1930 | Box 11 \ 3 03-page256 | |
| Inspection report on 24-EX shock absorbers after 10,000 miles of use. | 15th Aug 1930 | Box 11 \ 3 03-page257 | |
| Inspection report on the condition of a piston, cylinder, filter, and intermediate lever, with specific measurements and wear analysis. | 15th Aug 1930 | Box 11 \ 3 03-page258 | |
| Inspection report detailing the condition and measurements of dampers, shafts, bearings, links, pistons, and cylinders. | 15th Aug 1930 | Box 11 \ 3 03-page259 | |
| Inspection report detailing the condition of a bijur pipe, filter, and damper, noting measurements and blockages. | 15th Aug 1930 | Box 11 \ 3 03-page260 | |
| Points and modifications for components arising from a 6,000-mile report on the 24-EX model. | 15th Aug 1930 | Box 11 \ 3 03-page261 | |
| Modifications and issues with the radiator, carburation, and dynamo charging system. | 16th Aug 1930 | Box 11 \ 3 03-page262 | |
| The unsatisfactory method of lubricating the accelerator pedal shaft, proposing it be integrated into the central lubrication scheme. | 21th Aug 1930 | Box 11 \ 3 03-page263 | |
| Results of a 10,000 mile test on a camshaft and recommending a production run. | 1st Aug 1930 | Box 11 \ 3 03-page264 | |
| Radiator mounting, front axle pivot, and accelerator pedal lubrication for the 10,000 mile car 24-EX. | 28th Mar 1930 | Box 11 \ 3 03-page265 | |
| Cover memo from Sg. to Hs. regarding the 24-EX 10,000-mile L.R.Phantom II test, attaching another memo for comment. | 21th Sep 1930 | Box 11 \ 3 03-page266 | |
| Performance and issues report on a 24-EX Left-hand U.S.A. model. | 21th Aug 1930 | Box 11 \ 3 03-page267 | |
| Vehicle faults including radiator water loss, body-work condition, and carburetter noise. | 9th Sep 1930 | Box 11 \ 3 03-page268 | |
| Outstanding issues with the Phantom II Left Hand Chassis following extended road testing. | 9th Sep 1930 | Box 11 \ 3 03-page269 | |
| Modifications and tests on clutches, carburetters, and brakes for experimental cars. | 9th Sep 1930 | Box 11 \ 3 03-page270 | |
| Performance of vehicle 24-EX during a 10,000-mile test, comparing it to a standard car. | 9th Sep 1930 | Box 11 \ 3 03-page271 | |
| Radiator temperature test results at 30 m.p.h. and 45 m.p.h. with the bonnet and fan removed. | 12th Sep 1930 | Box 11 \ 3 03-page272 | |
| Required modifications for the 24-EX car, focusing on the slipper wheel and a new single-point engine mounting. | 21th Oct 1930 | Box 11 \ 3 03-page273 | |
| Instruction to complete the engine assembly for car 24-EX and to re-line the GWH front shoes with A.M.R.2 lining. | 1st Dec 1930 | Box 11 \ 3 03-page274 | |
| File divider with a handwritten reference number. | 25th Sep 1930 | Box 11 \ 3 03-page275 | |
| Specifications for left-hand drive chassis being supplied to America. | 25th Sep 1930 | Box 11 \ 3 03-page276 | |
| Specifications and proposed changes for car parts including wheels, bumpers, and radiator shutters. | 25th Sep 1930 | Box 11 \ 3 03-page277 | |
| List of features and modifications for the 25-EX model, including notes on parts for the U.S.A. market. | 25th Sep 1930 | Box 11 \ 3 03-page278 | |
| List of proposed modifications and standardizations for a vehicle, including clutch, floorboards, and carburetter. | 25th Sep 1930 | Box 11 \ 3 03-page279 | |
| Shipping car 25-EX to the U.S.A. and arranging a pre-departure test drive. | 17th Oct 1930 | Box 11 \ 3 03-page280 | |
| Arranging a meeting, a car test drive, and subsequent travel plans. | 21th Oct 1930 | Box 11 \ 3 03-page281 | |
| Internal memorandum clarifying that a sample was not sent for approval under the contract. | 24th Oct 1930 | Box 11 \ 3 03-page282 | |
| Data sheet for vehicle suspension, including shock damper loads, buffer clearances, spring poundage, and weights. | 27th Oct 1930 | Box 11 \ 3 03-page283 | |
| Letter from aboard the S.S. Homeric discussing a sea crossing and inquiring about results for low rating rear springs. | 5th Nov 1930 | Box 11 \ 3 03-page284 | |
| Requesting other reports and providing a mailing address for R.R. Springfield. | 10th Nov 1930 | Box 11 \ 3 03-page285 | |
| Cable detailing suspension test results and necessary adjustments. | 10th Nov 1930 | Box 11 \ 3 03-page286 | |
| Letter to E.W. Hives detailing progress on 'F' engine piston seizure issues and car work. | 14th Nov 1930 | Box 11 \ 3 03-page287 | |
| Suspension tuning, shock absorber loads, and ride comfort across various car models. | 14th Nov 1930 | Box 11 \ 3 03-page288 | |
| Engine roughness tests, focusing on flywheel bearing support and crankcase deflection. | 14th Nov 1930 | Box 11 \ 3 03-page289 | |
| Engine design questions and the discovery of the cause of knocks in shock absorbers. | 14th Nov 1930 | Box 11 \ 3 03-page290 | |
| Damper and shock absorber issues, referencing the Phantom II and American parts. | 14th Nov 1930 | Box 11 \ 3 03-page291 | |
| Copy of two telegrams from Springfield regarding a 1400-mile car test and battery specifications. | 14th Nov 1930 | Box 11 \ 3 03-page292 | |
| Specifications for a 50% stronger bonnet catch spring (PII). | 14th Nov 1930 | Box 11 \ 3 03-page293 | |
| 1400-mile road test of the 25-EX car in the United States, detailing performance and passenger comfort. | 14th Nov 1930 | Box 11 \ 3 03-page294 | |
| The 25-EX car, discussing its ride, price, and performance in comparison to other models. | 14th Nov 1930 | Box 11 \ 3 03-page295 | |
| Winter performance issues with heating and comparing the springing of the 25-EX model to Springfield cars. | 20th Nov 1930 | Box 11 \ 3 03-page296 | |
| Data table of vehicle weights and suspension buffer clearance measurements for various car models. | 20th Nov 1930 | Box 11 \ 3 03-page297 | |
| The 25-EX car following a 1900-mile test in the U.S.A., detailing feedback on coachwork and performance. | 18th Nov 1930 | Box 11 \ 3 03-page298 | |
| Comparative analysis report on steering, springing, and acceleration against a competing Springfield car, with proposals for improvements. | 18th Nov 1930 | Box 11 \ 3 03-page299 | |
| Specifications for the Phantom II chassis in the U.S.A., including wheel carriers, batteries, and petrol gauges. | 18th Nov 1930 | Box 11 \ 3 03-page300 | |
| List of chassis specification revisions, with many items being omitted or modified for the U.S. market. | 20th Jan 1930 | Box 11 \ 3 03-page301 | |
| Risks of jacking the car under the axle casing and a recommendation to strengthen noisy bonnet fasteners. | 21th Nov 1930 | Box 11 \ 3 03-page302 | |
| Cover letter for a springing chart for Phantom II cars, discussing weight measurements. | 22th Nov 1930 | Box 11 \ 3 03-page303 | |
| Note discussing the responsibility conflict between the UK and US entities over customer complaints and modifications for imported chassis. | 22th Nov 1930 | Box 11 \ 3 03-page304 | |
| Contract for 200 cars, product development for the US market, and suspension improvements. | 25th Nov 1930 | Box 11 \ 3 03-page305 | |
| Purchase of distinctive lamps for Springfield cars, comparing prices of 'Lucas' lamps with alternatives. | 25th Nov 1930 | Box 11 \ 3 03-page306 | |
| Cost of headlamps and comparing 'Staybrite' material with chromium plating. | 26th Nov 1930 | Box 11 \ 3 03-page307 | |
| Visit to the General Motors Proving Ground in Detroit. | 26th Nov 1930 | Box 11 \ 3 03-page308 | |
| Report page detailing observations of General Motors' vehicle testing methods and facilities. | 26th Nov 1930 | Box 11 \ 3 03-page309 | |
| Page from a document discussing a cost calculation for cars made by G.M. | 22th Nov 1930 | Box 11 \ 3 03-page310 | |
| Different car spring specifications, flexibility, and performance test results. | 22th Nov 1930 | Box 11 \ 3 03-page311 | |
| Fitting low rating springs and testing shock absorber settings on car model 25 EX. | 27th Nov 1930 | Box 11 \ 3 03-page312 | |
| Letter detailing travel arrangements in the US for demonstrations and a motor show. | 27th Nov 1930 | Box 11 \ 3 03-page313 | |
| Visit to the General Motors proving ground in Detroit and observations on a 12-cylinder Cadillac's experimental springing. | 27th Nov 1930 | Box 11 \ 3 03-page314 | |
| Page 2 of a typed communication mentioning a planned visit to Packard, Cadillac and Dayton. | 29th Nov 1930 | Box 11 \ 3 03-page315 | |
| Relaying negative customer feedback on the ride quality of the 25 EX and Phantom II models, unfavourably comparing them to the Phantom I and Silver Ghost. | 29th Nov 1930 | Box 11 \ 3 03-page316 | |
| Requesting the results of testing a car with more flexible springs at Springfield. | 9th Nov 1930 | Box 11 \ 3 03-page317 | |
| Note received from the USA discussing clutch performance and brake squeak on specific car models. | 29th Nov 1930 | Box 11 \ 3 03-page318 | |
| The market reception and sales strategy for the 25 HP car in the U.S.A., comparing it to the Phantom I. | 1st Nov 1930 | Box 11 \ 3 03-page319 | |
| The market position and potential of the 25 HP model in the U.S.A market. | 1st Dec 1930 | Box 11 \ 3 03-page320 | |
| Features, price, and performance of Delco shock absorbers. | 1st Dec 1930 | Box 11 \ 3 03-page321 | |
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