| Description | Date | Identifier | |
| Technical document detailing the Alumilite Process for anodizing and treating aluminium alloys. | 20th Feb 1940 | Box 116 \ 2 scan0139 | |
| Follow-up letter to High Duty Alloys Ltd. requesting figures on magnesium forgings. | 20th Feb 1940 | Box 116 \ 2 scan0140 | |
| Letter from High Duty Alloys Ltd. providing technical data on magnesium alloy forgings for propeller blades. | 27th Feb 1940 | Box 116 \ 2 scan0141 | |
| Letter to High Duty Alloys Ltd. requesting information on a new aluminium alloy with anti-corrosion properties. | 15th Apr 1940 | Box 116 \ 2 scan0142 | |
| Letter from High Duty Alloys Ltd. requesting confirmation of the successful use of AC.9 bearings in car engines. | 8th Jun 1940 | Box 116 \ 2 scan0143 | |
| Extract of a letter from Mr. John Howlett of Wellworthy Piston Rings Ltd. concerning difficulties with the AC.9 bearing product. | 7th Jun 1940 | Box 116 \ 2 scan0144 | |
| Letter to J. Devereux of High Duty Alloys Ltd. enclosing correspondence regarding A.C.9. bearing material. | 2nd Jul 1940 | Box 116 \ 2 scan0145 | |
| Letter to Delco Remy & Hyatt Ltd. requesting to be supplied with fan and pump shaft bearings. | 14th Dec 1940 | Box 116 \ 2 scan0146 | |
| Letter to Delco Remy & Hyatt Ltd. requesting a supply of Fan & Pump Shaft Bearings. | 21th Dec 1940 | Box 116 \ 2 scan0147 | |
| Inquiry about ignition trouble on chassis B.220 G.A. and the availability of spare distributor heads. | 20th Aug 1941 | Box 116 \ 2 scan0148 | |
| Letter from Vandervell Products Ltd. confirming the manufacture of two sets of Big End Bearings for a Bentley Model B.60. | 22th Aug 1941 | Box 116 \ 2 scan0149 | |
| Letter regarding the manufacture of 12 Bushes for test purposes and experimentation with Clevite material. | 30th Aug 1941 | Box 116 \ 2 scan0150 | |
| Official order be sent to Vandervell Products Ltd. for 12 Gearbox Sideshaft Bushes. | 1st Sep 1941 | Box 116 \ 2 scan0151 | |
| Letter to Vandervell Products Ltd. regarding experiments on Clevite and an upcoming order for 12 bushes. | 1st Sep 1941 | Box 116 \ 2 scan0152 | |
| Letter from S.S. Cars Ltd. to W.A. Robotham regarding a recent meeting, experimental work, and the provision of drawings for bearings. | 11th Dec 1937 | Box 116 \ 3 scan0001 | |
| Letter to W. Lyons of S.S. Cars Ltd. regarding engine firing issues and component specifications. | 11th Dec 1937 | Box 116 \ 3 scan0002 | |
| Letter from SS Cars Ltd regarding prints for main and con rod bearings for a 3 1/2 Litre engine, and requesting the name of a valve spring supplier. | 14th Dec 1937 | Box 116 \ 3 scan0003 | |
| Letter to S.S. Cars Ltd. concerning the suitability of aluminum tin alloy bearings for crankshafts. | 15th Dec 1937 | Box 116 \ 3 scan0004 | |
| Letter from the SS Works Managing Director's Office regarding a running-on problem and sending a cylinder head for examination. | 17th Dec 1937 | Box 116 \ 3 scan0005 | |
| Letter from SS Cars Ltd. providing the weight of a 3.5-litre crankshaft before machining. | 20th Dec 1937 | Box 116 \ 3 scan0006 | |
| Letter to S.S. Cars Ltd. regarding the production and fitting of aluminium-tin bearings. | 31th Dec 1937 | Box 116 \ 3 scan0007 | |
| The despatch of 12 connecting rods to S.S. Cars Ltd. | 25th Feb 1938 | Box 116 \ 3 scan0008 | |
| Letter to S.S. Cars Ltd. regarding connecting rods and the inability to fit Aluminium-Tin bearings due to workload. | 25th Feb 1938 | Box 116 \ 3 scan0009 | |
| Letter from SS Cars Limited regarding connecting rods and aluminium tinned bearings. | 1st Mar 1938 | Box 116 \ 3 scan0010 | |
| Letter to S.S. Cars Ltd. regarding a delay in providing details for Aluminium-Tin bearings. | 3rd Mar 1938 | Box 116 \ 3 scan0011 | |
| Letter to Morris Commercial Motors Ltd. arranging a meeting about Aluminium-tin bearings. | 6th Jan 1938 | Box 116 \ 3 scan0012 | |
| Letter from Morris Commercial Cars Ltd. arranging a meeting to discuss Aluminium-tin Bearings. | 8th Jan 1938 | Box 116 \ 3 scan0013 | |
| Letter to Morris Commercial Cars Ltd. confirming a meeting to discuss bearing details. | 10th Jan 1938 | Box 116 \ 3 scan0014 | |
| Visit to Morris Commercial Cars Ltd. to discuss bearings for a new oil engine design. | 17th Jan 1938 | Box 116 \ 3 scan0015 | |
| Letter from Wellworthy Piston Rings Ltd. to Morris Commercial Cars Ltd. requesting crankshaft material and hardness specifications for V.E.B. engine main bearings. | 9th May 1938 | Box 116 \ 3 scan0016 | |
| Letter from ALTA Car & Engineering Co. Ltd. enquiring about the suitability of AC9 bearing material for their racing engines. | 5th Sep 1938 | Box 116 \ 3 scan0017 | |
| Letter from Alta Car & Engineering Co. Ltd. regarding confidential data on engines. | 5th Sep 1938 | Box 116 \ 3 scan0018 | |
| Letter to Alta Car & Engineering Co. Ltd. regarding the use of AC.9 alloy bearing material in their racing engines. | 9th Sep 1938 | Box 116 \ 3 scan0019 | |
| Letter from Alta Car & Engineering Co. Ltd. acknowledging a previous letter and advising that the requested drawings and data will be sent shortly. | 12th Sep 1938 | Box 116 \ 3 scan0020 | |
| Letter from Alta Car & Engineering Co. Ltd. regarding their 2-Litre supercharged racing engine and AC 9 bearing material. | 22th Apr 1939 | Box 116 \ 3 scan0021 | |
| Letter from Alta Car & Engineering Co. Ltd. asking questions about engine component specifications and materials. | 22th Apr 1939 | Box 116 \ 3 scan0022 | |
| Letter to Alto Car & Engineering Co. Ltd. regarding Aluminium-Tin Bearings. | 26th Apr 1939 | Box 116 \ 3 scan0023 | |
| Letter to Alto Car & Engineering Co. Ltd. specifying working clearances for connecting rod and main bearings. | 26th Apr 1939 | Box 116 \ 3 scan0024 | |
| Letter from Alta Car & Engineering Co. Ltd. regarding connecting rods and bearing thickness. | 1st May 1939 | Box 116 \ 3 scan0025 | |
| Letter to Alta Car & Engineering Co. Ltd. discussing bearing thickness specifications and recommending a trial. | 3rd May 1939 | Box 116 \ 3 scan0026 | |
| Letter from Alta Car & Engineering Co. Ltd. regarding information on bearing thickness and their intention to approach Messrs. Wellworthy. | 5th May 1939 | Box 116 \ 3 scan0027 | |
| Letter from Alta Car & Engineering Co. Ltd. regarding unsatisfactory test results for A.C.9 bearings. | 10th Jul 1939 | Box 116 \ 3 scan0028 | |
| Letter to Alta Car & Engineering Co. Ltd. regarding the inspection and diagnosis of bearings. | 12th Jul 1939 | Box 116 \ 3 scan0029 | |
| Letter to Leyland Motors discussing the use and properties of a new aluminium-tin alloy for big end bearings. | 26th Aug 1937 | Box 116 \ 3 scan0030 | |
| Letter from Leyland Motors regarding bearing metal alternatives for a Bentley car. | 28th Aug 1937 | Box 116 \ 3 scan0031 | |
| Letter to Leyland Motors discussing bearing materials and the use of cast crankshafts. | 3rd Sep 1937 | Box 116 \ 3 scan0032 | |
| Letter from Leyland Motors discussing bearing metals and the reliability of cast crankshafts. | 7th Sep 1937 | Box 116 \ 3 scan0033 | |
| Letter to Leyland Motors Ltd. regarding Mr. Robotham's absence on holiday. | 8th Sep 1937 | Box 116 \ 3 scan0034 | |
| Letter from Leyland Motors discussing bearing materials (Satco, RR.56) and cast crankshafts. | 11th Sep 1937 | Box 116 \ 3 scan0035 | |
| Page 2 of a letter from Leyland Motors Limited arranging a meeting in Derby. | 24th Sep 1937 | Box 116 \ 3 scan0036 | |
| Letter from Leyland Motors Ltd. regarding testing new AC.6 die-cast aluminium alloy bearings in an 8.6-litre oil engine. | 24th Sep 1937 | Box 116 \ 3 scan0037 | |
| Continuation of a letter from Leyland Motors Limited regarding witnessing tests on bearings. | 28th Sep 1937 | Box 116 \ 3 scan0038 | |
| Requesting the production of 12 metal bearings for a Leyland engine to be fitted to rods. | 28th Sep 1937 | Box 116 \ 3 scan0039 | |
| Connecting rod bearing for a Leyland 8 Litre oil engine. | 28th Sep 1937 | Box 116 \ 3 scan0040 | |
| Letter to Leyland Motors Ltd. regarding a delay in dispatching connecting rods and bearings. | 15th Oct 1937 | Box 116 \ 3 scan0041 | |
| Letter to Leyland Motors regarding a delay in supplying connecting rods and a query about an oil supply hole in the bearings. | 18th Oct 1937 | Box 116 \ 3 scan0042 | |
| Letter from Leyland Motors regarding connecting rods, bearings, and testing arrangements. | 19th Oct 1937 | Box 116 \ 3 scan0043 | |
| Letter from Leyland Motors regarding the testing and modification of six connecting rods. | 21th Oct 1937 | Box 116 \ 3 scan0044 | |
| Letter to Leyland Motors Ltd. regarding the despatch of connecting rods with Aluminium Tin bearings and arranging a visit. | 12th Nov 1937 | Box 116 \ 3 scan0045 | |
| Letter from Leyland Motors advising that engine tests on AC.6 big end bearings are complete and ready for inspection. | 16th Nov 1937 | Box 116 \ 3 scan0046 | |
| Letter from Leyland Motors requesting a change in communication protocol for the dispatch and testing of parts. | 19th Nov 1937 | Box 116 \ 3 scan0047 | |
| Letter to Leyland Motors Ltd. arranging a visit to discuss A.C.6 alloy bearings. | 17th Nov 1937 | Box 116 \ 3 scan0048 | |
| Letter from Leyland Motors Ltd. enclosing information requested by Mr. Matthews regarding main bearing, connecting rod, and oil pump details. | 25th Nov 1937 | Box 116 \ 3 scan0049 | |
| Letter to Leyland Motor Co. Ltd. regarding information on a chart and future tests on a seized AC.6 bearing's effect on a crankshaft. | 30th Nov 1937 | Box 116 \ 3 scan0050 | |
| Letter from Leyland Motors detailing the results of an engine bearing seizure test. | 2nd Dec 1937 | Box 116 \ 3 scan0051 | |
| Continuation page of a letter from Leyland Motors Limited's Chief Engineer. | 3rd Dec 1937 | Box 116 \ 3 scan0052 | |
| Letter to Leyland Motors discussing the performance and seizure issues of A.C.6 versus R.R.56 bearing materials. | 3rd Dec 1937 | Box 116 \ 3 scan0053 | |
| Short internal memo regarding a letter from Leylands concerning A.C.6 bearing material and an employee's performance. | 3rd Dec 1937 | Box 116 \ 3 scan0054 | |
| Report of a visit to Leyland Motors to examine Hall's metal connecting rod bearings and compare different alloys. | 4th Dec 1937 | Box 116 \ 3 scan0055 | |
| Rod clearance tests and the supply of bearings to Leyland for road condition testing. | 4th Dec 1937 | Box 116 \ 3 scan0056 | |
| Letter to Leyland Motors Ltd. regarding missing drawings for AC.9 bearing blanks needed for production. | 5th Jul 1938 | Box 116 \ 3 scan0057 | |
| Letter from English Racing Automobiles discussing test results of an aluminium tin alloy for bearings. | 26th Oct 1937 | Box 116 \ 3 scan0058 | |
| Letter to English Racing Automobiles regarding the performance of an experimental Aluminium Tin Alloy in big-end bearings. | 16th Nov 1937 | Box 116 \ 3 scan0059 | |
| Letter from English Racing Automobiles regarding oil filtering conditions and the supply of Aluminium Tin. | 17th Nov 1937 | Box 116 \ 3 scan0060 | |
| Requesting costings for producing E.R.A. bearings and bearing liners in various quantities. | 25th Nov 1937 | Box 116 \ 3 scan0061 | |
| Price quotation for Halls metal bearings and alloy liners for English Racing Automobiles Ltd. | 25th Nov 1937 | Box 116 \ 3 scan0062 | |
| Request to prepare 50 sets of connecting rod bearing blanks and 50 sets of R.R. 56 liners for E.R.A. Ltd. | 10th Dec 1937 | Box 116 \ 3 scan0063 | |
| Letter to E.R.A. Ltd. regarding the production of aluminium-tin connecting rod bearings for experimental purposes. | 13th Dec 1937 | Box 116 \ 3 scan0064 | |
| Internal memorandum concerning the production, pricing, and ordering process for E.R.A. bearings and liners. | 11th Dec 1937 | Box 116 \ 3 scan0065 | |
| Letter from English Racing Automobiles Ltd. regarding an order for 50 aluminium tin castings for big end bearings. | 17th Dec 1937 | Box 116 \ 3 scan0066 | |
| Order from English Racing Automobiles Ltd. for aluminium tin castings for big end bearing shells. | 17th Dec 1937 | Box 116 \ 3 scan0067 | |
| Technical drawing of a connecting rod big end bearing. | 5th Jun 1937 | Box 116 \ 3 scan0068 | |
| Letter to E.R.A. Ltd. regarding an order for centre-main bearings and a change in the manufacturing firm. | 24th Aug 1938 | Box 116 \ 3 scan0069 | |
| Letter from English Racing Automobiles Ltd. confirming an order for aluminium-tin alloy Centre Main Bearings has been forwarded. | 3rd Sep 1938 | Box 116 \ 3 scan0070 | |
| Letter to E.R.A. Ltd. concerning the urgent production of AC.9 bearings. | 11th Nov 1938 | Box 116 \ 3 scan0071 | |
| Letter to Wellworthy Piston Rings Ltd regarding an urgent part request from E.R.A. Ltd. | 15th Nov 1938 | Box 116 \ 3 scan0072 | |
| Letter from the Experimental Department confirming the dispatch of A.C.9 alloy die-cast rings. | 15th Nov 1938 | Box 116 \ 3 scan0073 | |
| Letter to Wellworthy Piston Rings Ltd. requesting their scale of charges for rings to align pricing. | 23th Nov 1938 | Box 116 \ 3 scan0074 | |
| Letter from Wellworthy Piston Rings Ltd. regarding the pricing of R.R.AC.9 bearings for E.R.A. Ltd. | 25th Nov 1938 | Box 116 \ 3 scan0075 | |
| Letter from the Experimental Department regarding A.C.9 material supplied to a third party. | 29th Nov 1938 | Box 116 \ 3 scan0076 | |
| Letter from Wellworthy Piston Rings seeking advice on a component design from R. Lister & Co. | 28th Oct 1938 | Box 116 \ 3 scan0077 | |
| Letter from R. A. Lister & Co. to Wellworthy Piston Rings Ltd. regarding a trial of Aluminium Tin Alloy bearings. | 26th Oct 1938 | Box 116 \ 3 scan0078 | |
| Blueprint drawing for a 'BIG END BUSH' from Wellworthy Piston Rings Limited. | 29th Oct 1937 | Box 116 \ 3 scan0079 | |
| Summary of bearing orders and progress for the month of October. | 31th Oct 1938 | Box 116 \ 3 scan0080 | |
| Letter from Wellworthy Piston Rings Ltd. concerning deliveries and outstanding orders for AC.9 Bearings. | 14th Feb 1939 | Box 116 \ 3 scan0081 | |
| Summary of bearing orders for January, detailing outstanding orders and despatched bearings. | 1st Feb 1939 | Box 116 \ 3 scan0082 | |
| Inquiry into the cleaning methods and durability of Cellulose enamel finish compared to traditional varnish. | 6th Feb 1926 | Box 117 \ 1 scan0001 | |
| Paint blistering and dulling issues when using cellulose lacquer on a car. | 15th Feb 1926 | Box 117 \ 1 scan0002 | |
| Continued discussion on car paint finishes, comparing a durable finish with the wet cloth method. | 15th Feb 1926 | Box 117 \ 1 scan0003 | |
| Confidential memo from R. regarding issues with car body 'booming' and the potential of all-steel bodies. | 1st Oct 1930 | Box 117 \ 1 scan0004 | |
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