| Description | Date | Identifier | |
| Letter to Brooklands Racing Track requesting dates when the track will be closed for practice. | 6th May 1931 | Box 29 \ 3 Scan306 | |
| Letter from Brooklands Automobile Racing Club regarding track closures and access for cars. | 7th May 1931 | Box 29 \ 3 Scan307 | |
| Letter to W. Percy Bradley at Brooklands Motor Course requesting a list of Race Meetings that was omitted from previous correspondence. | 8th May 1931 | Box 29 \ 3 Scan308 | |
| Radiator tests conducted at Brooklands, comparing the efficiency and hydraulic resistance of hexagonal and square tube designs. | 19th May 1931 | Box 29 \ 3 Scan309 | |
| The comparison and testing of hexagon radiator tubes and bonnet ventilation systems. | 19th May 1931 | Box 29 \ 3 Scan310 | |
| Radiator efficiency improvements and the need for a wind tunnel for further development. | 19th May 1931 | Box 29 \ 3 Scan311 | |
| Water flow tests conducted on a B.15 unit, comparing four different radiator types. | 21th Apr 1931 | Box 29 \ 3 Scan312 | |
| Comparison of radiator matrix types and their boiling temperatures at specified speeds. | 21th Apr 1931 | Box 29 \ 3 Scan313 | |
| Test report comparing boiling temperatures for different types of bonnet ventilation at various speeds. | 19th Jun 1931 | Box 29 \ 3 Scan314 | |
| Graph comparing the performance of different radiator types against engine RPM. | 19th Jun 1931 | Box 29 \ 3 Scan315 | |
| The reverse side of a document or photograph with a purple date stamp. | 21th Apr 1931 | Box 29 \ 3 Scan316 | |
| Comparison table of radiator performance tests and specifications for various matrix types. | 21th Apr 1931 | Box 29 \ 3 Scan317 | |
| Note directing the user to the original document for photostats. | 19th May 1931 | Box 29 \ 3 Scan318 | |
| Data sheet of radiator tests conducted at Brooklands with various radiator types and configurations. | 14th May 1931 | Box 29 \ 3 Scan319 | |
| Higher geared axle ratio tests carried out at Brooklands on Continental Phantom II type cars. | 4th Jun 1931 | Box 29 \ 3 Scan320 | |
| Timed lap performance tests comparing different axle configurations, cut-out settings, and body windage. | 4th Jun 1931 | Box 29 \ 3 Scan321 | |
| Summary of results concluding that the 12 X 41 axle would not improve the standard Continental Type car. | 4th Jun 1931 | Box 29 \ 3 Scan322 | |
| Continental model's performance based on axle ratio tests and the urgent need for power upgrades to improve sales against competitors. | 5th Jun 1931 | Box 29 \ 3 Scan323 | |
| Speed and acceleration tests conducted on three cars at Brooklands. | 23th Jun 1931 | Box 29 \ 3 Scan324 | |
| Performance trials comparing different vehicle configurations, focusing on top speed and acceleration. | 23th Jun 1931 | Box 29 \ 3 Scan325 | |
| Comparison report on an 8-cylinder Buick with a 3620 c.c. displacement. | 23th Jun 1931 | Box 29 \ 3 Scan326 | |
| Performance graph plotting Road Wheel Horsepower against RPM and Road Speed for different engine configurations. | 19th Jun 1931 | Box 29 \ 3 Scan327 | |
| Performance graph from Brooklands tests comparing different engine configurations and their outputs. | 19th Jun 1931 | Box 29 \ 3 Scan328 | |
| Blank page with a 'Print Room' date stamp. | 24th Jun 1931 | Box 29 \ 3 Scan329 | |
| Performance graph from Brooklands tests comparing two different engine configurations. | 19th Jun 1931 | Box 29 \ 3 Scan330 | |
| Proposing a company membership to the Brooklands Automobile Racing Club. | 23th Jun 1931 | Box 29 \ 3 Scan331 | |
| Requesting a signature on a proposal form to join the B.A.R.C. | 24th Jun 1931 | Box 29 \ 3 Scan332 | |
| Vehicle comparison tests at Brooklands, evaluating the performance and handling of various cars. | 24th Jun 1931 | Box 29 \ 3 Scan333 | |
| Letter discussing a membership application for the Brooklands Club, including subscription fees and rules. | 24th Jun 1931 | Box 29 \ 3 Scan334 | |
| Letter of application for membership to the Brooklands Automobile Racing Club. | 9th Jul 1931 | Box 29 \ 3 Scan335 | |
| Test report on the improved high-speed performance of a Phantom II car, detailing tests at Brooklands and a resulting engine failure. | 13th Jul 1931 | Box 29 \ 3 Scan336 | |
| Engine troubles including crankshaft breakage, vibrations, poor slow running, and induction pipe roar. | 10th Jul 1931 | Box 29 \ 3 Scan337 | |
| Performance test results for the 27Ex car at Brooklands, showing top gear acceleration. | 10th Jul 1931 | Box 29 \ 3 Scan338 | |
| Carburetter tests conducted at Brooklands on a 12-GIV chassis. | 6th Aug 1931 | Box 29 \ 3 Scan339 | |
| Test results for an S.U. carburetter with plain bonnet, detailing performance with strong and weak mixtures, and petrol consumption tests. | 13th Aug 1931 | Box 29 \ 3 Scan340 | |
| Performance data for vehicle 12-GIV at Brooklands, comparing S.U. and Standard carburettors. | 13th Aug 1931 | Box 29 \ 3 Scan341 | |
| Test report on an improved 25 HP car at Brooklands with modification details and performance notes. | 29th Aug 1931 | Box 29 \ 3 Scan342 | |
| Bar chart comparing lap speeds of a 25 HP car with various engine and axle modifications at Brooklands Track. | 26th Aug 1931 | Box 29 \ 3 Scan343 | |
| Bar chart comparing the improved high speed performance of a 25 HP car with various engine configurations at Brooklands Track. | 26th Aug 1931 | Box 29 \ 3 Scan344 | |
| Mostly blank or faded page with a 'Print Room' stamp in the bottom right corner. | 29th Aug 1931 | Box 29 \ 3 Scan345 | |
| Requesting a further supply of Brooklands track tickets. | 4th Aug 1931 | Box 29 \ 3 Scan346 | |
| Speed test results for various axle, engine, and carburetter configurations. | 27th Aug 1931 | Box 29 \ 3 Scan347 | |
| Performance test results for chassis 12-GIV and 16-GIV at Brooklands, comparing different axle and carburettor configurations. | 26th Aug 1931 | Box 29 \ 3 Scan348 | |
| Standard performance test results on various hill climbs for a 12-G-W 25 HP engine. | 13th Jul 1920 | Box 29 \ 3 Scan349 | |
| Telegram confirming availability, with exceptions for the hours between 10-11 and 3-4 o'clock. | 13th Jul 1920 | Box 29 \ 3 Scan350 | |
| Comparing bonnet temperatures using bypass and shutter water temperature control methods. | 21th Sep 1934 | Box 29 \ 3 Scan351 | |
| Formulae and calculations for determining bonnet temperature using Bypass Control and Shutter Methods. | 21th Sep 1934 | Box 29 \ 3 Scan352 | |
| Test schedule for radiator and cooling fan comparisons to be carried out at Brooklands. | 12th Oct 1934 | Box 29 \ 3 Scan353 | |
| List of tests comparing bonnet temperatures, radiator matrix area, and induction pipes. | 12th Oct 1934 | Box 29 \ 3 Scan354 | |
| Bumping test results detailing the lifespan of spring clips. | 11th May 1914 | Box 29 \ 4 Scan001 | |
| Test log sheet for Spring Clips, detailing time to failure and reference numbers. | 11th May 1914 | Box 29 \ 4 Scan002 | |
| Test results for a spring clip's average life before breakage. | 17th Sep 1914 | Box 29 \ 4 Scan003 | |
| Distance Plate F.4971 for Rear Spring Clips. | 17th Sep 1914 | Box 29 \ 4 Scan004 | |
| Loose front spring clips and the breakage of centre bolts on new cars. | 4th Apr 1921 | Box 29 \ 4 Scan005 | |
| Recurring issues with loose rear spring clips on a 20-HP car during Barker Trials. | 23th Mar 1926 | Box 29 \ 4 Scan006 | |
| Issue with the 20 HP model's spring to axle clips working loose. | 29th Mar 1926 | Box 29 \ 4 Scan007 | |
| Design of spring clips and the decision not to make them solid with the spring plates. | 31th Mar 1927 | Box 29 \ 4 Scan008 | |
| Design of riveted-on clips for road springs on 40/50 and 20 HP models. | 3rd May 1927 | Box 29 \ 4 Scan009 | |
| Design and production of riveted spring clips, proposing a new design to replace existing types. | 1st May 1927 | Box 29 \ 4 Scan010 | |
| Comparative testing of spring materials and clip designs for vehicle bumpers. | 20th Jul 1927 | Box 29 \ 4 Scan011 | |
| Confirming the expedited dispatch of various front springs from a supplier and instructions for their handling upon arrival. | 20th Jul 1927 | Box 29 \ 4 Scan012 | |
| Comparative testing of springs made from Silico Manganese and Chrome Vanadium steel, and the strength of a new clip design. | 3rd Aug 1927 | Box 29 \ 4 Scan013 | |
| Design and manufacturing options for a road spring clip, comparing rolled strip to forged clips. | 25th Aug 1927 | Box 29 \ 4 Scan014 | |
| Standardisation of chassis parts, specifically for road spring plate clips. | 7th Sep 1927 | Box 29 \ 4 Scan015 | |
| Implementation and approval process for fitting a new part to a chassis. | 8th Sep 1921 | Box 29 \ 4 Scan016 | |
| Letter discussing the standardization of springs and spring clips. | 9th Sep 1927 | Box 29 \ 4 Scan017 | |
| The concluding page of a letter from the Technical Production Engineer. | 9th Sep 1927 | Box 29 \ 4 Scan018 | |
| Test report comparing the life of Silico Manganese and Chrome Vanadium front road springs. | 3rd Oct 1927 | Box 29 \ 4 Scan019 | |
| New clips for the centralised chassis lubrication pipe on the front springs. | 18th Oct 1927 | Box 29 \ 4 Scan020 | |
| Issue with rear spring clip nuts striking the frame, proposing a modification to increase clearance. | 4th Jan 1930 | Box 29 \ 4 Scan021 | |
| Brief typed note forwarding correspondence based on instructions. | 13th Aug 1928 | Box 29 \ 4 Scan022 | |
| Short typed note suggesting two letters of testimonial be forwarded for review or filing. | 8th Aug 1928 | Box 29 \ 4 Scan023 | |
| Letter from Mr. Cooper about a tyre he supplied which may achieve 50,000 miles. | 3rd Aug 1926 | Box 29 \ 4 Scan024 | |
| Letter from India Tyre & Rubber Co discussing tyre sales, competitor pricing, and product quality. | 19th Jul 1928 | Box 29 \ 4 Scan025 | |
| Letter from a tyre manufacturer proposing a comparative test of their 'India super tyres' for vehicles. | 19th Jul 1928 | Box 29 \ 4 Scan026 | |
| Letter from The Lanarkshire Tramways Company regarding the return of a failed tyre after achieving record mileage. | 22th May 1928 | Box 29 \ 4 Scan027 | |
| Letter from the North Western Road Car Company to The India Tyre & Rubber Co. regarding a tyre cover that is unfit for repair. | 16th May 1928 | Box 29 \ 4 Scan028 | |
| Letter from a tyre manufacturer to a customer guaranteeing a tyre mileage of 30,000 miles. | 2nd Aug 1928 | Box 29 \ 4 Scan029 | |
| Letter discussing preferences for car tyre pressure and rim types. | 14th Aug 1928 | Box 29 \ 4 Scan030 | |
| Letter to The India Tyre Co. Ltd. enquiring about the price and specifications for a set of six tyres for testing. | 14th Aug 1928 | Box 29 \ 4 Scan031 | |
| Letter addressing a clerical error in charging the retail instead of trade price to Messrs India Tyre & Rubber Co. for a wheel and cover. | 5th Sep 1928 | Box 29 \ 4 Scan032 | |
| Letter from a tyre manufacturer regarding a new 33 x 6.75 tyre, its design, pricing and testing conditions. | 12th Feb 1929 | Box 29 \ 4 Scan033 | |
| Continuation sheet of a letter from India Tyre & Rubber Co. regarding the supply of Super Blue Tubes. | 9th Jan 1930 | Box 29 \ 4 Scan034 | |
| Customer objections and fitting issues for large section tyres in India and other markets. | 9th Jan 1930 | Box 29 \ 4 Scan035 | |
| Letter about Silent Tread Tires from the India Tire & Rubber Co. | 24th Mar 1930 | Box 29 \ 4 Scan036 | |
| Steering complaint from Sir Henry Segrave for car 80-WJ, detailing findings of wheel imbalance and pivot lean. | 11th Apr 1930 | Box 29 \ 4 Scan037 | |
| Request for an opinion on balancing wheels and tyres from Major Segrave's car. | 14th Apr 1930 | Box 29 \ 4 Scan038 | |
| The issue of 'India' brand tyres being out of balance and the negative effect on steering. | 14th Apr 1930 | Box 29 \ 4 Scan039 | |
| Rejection of India Tyres from Car Mart that are balanced beyond the limits of correcting weights. | 15th Apr 1930 | Box 29 \ 4 Scan040 | |
| Returning out-of-balance India Tyres to the works at Inchinnan. | 23th Apr 1930 | Box 29 \ 4 Scan041 | |
| Letter discussing wheel balancing issues on a customer's car fitted with India tyres. | 16th Apr 1930 | Box 29 \ 4 Scan042 | |
| Letter from India Tyre & Rubber Co. regarding the balancing of tyres for the Phantom II chassis. | 1st Mar 1930 | Box 29 \ 4 Scan043 | |
| Excessive out-of-balance condition of 'India' tyres and tubes from a customer's car. | 23th Apr 1930 | Box 29 \ 4 Scan044 | |
| The despatch of a faulty 'India' 40/50 HP tyre for replacement due to a manufacturing defect. | 24th Apr 1930 | Box 29 \ 4 Scan045 | |
| Cover note enclosing a letter and enclosure from Capt. Bowman regarding India Tyres. | 24th Apr 1930 | Box 29 \ 4 Scan046 | |
| Letter from The Car Mart Ltd. regarding the supply of specially balanced tyres and tubes from India Tyre & Rubber Company. | 23th Apr 1930 | Box 29 \ 4 Scan047 | |
| Letter from India Tyre & Rubber Co. regarding the balancing of tyres and tubes. | 18th Apr 1930 | Box 29 \ 4 Scan048 | |
| Unacceptable practice by 'India' Tyres of balancing tyres by pairing imbalanced covers with imbalanced tubes. | 25th Apr 1930 | Box 29 \ 4 Scan049 | |
| Proposal to increase the specification limit for 20-inch wheels and to inform the India Tyre Co. | 25th Apr 1930 | Box 29 \ 4 Scan050 | |
| The return of Major Segrave's 'India' tyre and the subsequent follow-up with the India Tyre Company. | 24th May 1930 | Box 29 \ 4 Scan051 | |
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