| Description | Date | Identifier | |
| Letter from The Associated Equipment Co Ltd regarding main bearings made from a new aluminium alloy, A.C.9. | 7th Mar 1938 | Box 116 \ 1 scan0107 | |
| Letter to The Associated Equipment Co. Ltd. confirming the clearance for AC.9 bearing alloy. | 9th Mar 1938 | Box 116 \ 1 scan0108 | |
| Letter to The Associated Equipment Co. Ltd. requesting an update on supplied A.C.9 alloy main bearing material. | 11th May 1938 | Box 116 \ 1 scan0109 | |
| Letter regarding the endurance testing of A.C.9 alloy main bearings. | 12th May 1938 | Box 116 \ 1 scan0110 | |
| Letter to The Associated Equipment Co. Ltd. arranging a visit to discuss tests on aluminium tin bearings. | 14th May 1938 | Box 116 \ 1 scan0111 | |
| Letter from The Associated Equipment Co Ltd discussing chassis selling costs per pound. | 20th May 1938 | Box 116 \ 1 scan0112 | |
| Continuation sheet of a letter from The Associated Equipment Co. Ltd. | 1st Apr 1937 | Box 116 \ 1 scan0113 | |
| Data sheet for passenger vehicle chassis, detailing alternatives and additions for petrol engines and lighting. | 1st Nov 1937 | Box 116 \ 1 scan0114 | |
| AEC Southall data sheet for bus, coach, and trolley bus chassis specifications. | 1st Nov 1937 | Box 116 \ 1 scan0115 | |
| Letter to G.D. Robinson of The Associated Equipment Co., Ltd. thanking him for information. | 21th May 1938 | Box 116 \ 1 scan0116 | |
| Visit to A.E.C. to inspect aluminium tin bearings and discuss commercial vehicle production. | 23th May 1938 | Box 116 \ 1 scan0117 | |
| Cost analysis and competitive comparison for the B.50 chassis, detailing materials, pricing, and profitability. | 23th May 1938 | Box 116 \ 1 scan0118 | |
| Concluding statement regarding the feasibility of the price fixed for the B.50 chassis. | 23th May 1938 | Box 116 \ 1 scan0119 | |
| Letter to Maurice Wilks of Rover regarding a new bearing alloy and offering assistance with lubrication. | 23th Jul 1937 | Box 116 \ 1 scan0120 | |
| Letter from The Rover Company Ltd to W. A. Robotham regarding sending an engine, crankcase, and shaft. | 27th Jul 1937 | Box 116 \ 1 scan0121 | |
| Letter to M.C. Wilks of The Rover Company regarding an engineer's visit and a recently acquired Oldsmobile. | 28th Jul 1937 | Box 116 \ 1 scan0122 | |
| Letter from The Rover Company Ltd discussing a proposed meeting, an Oldsmobile car's features, and steering layout. | 29th Jul 1937 | Box 116 \ 1 scan0123 | |
| Letter from The Rover Company discussing steering offset and comparing Packard and G.M. suspension geometry. | 29th Jul 1937 | Box 116 \ 1 scan0124 | |
| Letter to M. Wilks of The Rover Co., Ltd. discussing steering lightness, king pin offset, and wishbone suspension design. | 30th Jul 1937 | Box 116 \ 1 scan0125 | |
| Cover letter to M.C. Wilks of Rover Co. Ltd. enclosing a report on king pin inclination and steering heaviness. | 17th Aug 1937 | Box 116 \ 1 scan0126 | |
| Letter from The Rover Company Ltd regarding a meeting about connecting rod bearings and lubrication. | 24th Aug 1937 | Box 116 \ 1 scan0127 | |
| Outlining recommendations sent to the Rover Co. for using alloy big-end bearings in their engines. | 1st Sep 1937 | Box 116 \ 1 scan0128 | |
| Recommendations for improving Aluminium-Tin connecting rod bearings for the Rover 20 HP engine, with an attached blueprint. | 30th Aug 1937 | Box 116 \ 1 scan0129 | |
| Comparison of Rover engine bearing lubrication and materials against Bentley practice, with proposed improvements. | 30th Aug 1937 | Box 116 \ 1 scan0130 | |
| Letter to Maurice Wilks of The Rover Company regarding the use of R.R. alloy in big-end bearings and related experiments. | 1st Sep 1937 | Box 116 \ 1 scan0131 | |
| Letter to M. Wilks discussing high-speed instability in a Rover, possibly caused by steering geometry or shock absorbers. | 1st Sep 1937 | Box 116 \ 1 scan0132 | |
| Letter from The Rover Company Ltd. discussing crankshaft drilling, bearings, and an experimental 20 HP car. | 2nd Sep 1937 | Box 116 \ 1 scan0133 | |
| Letter from The Rover Company Limited to W. A. Robotham Esq. regarding Silentbloc rubber bushes for independent suspension. | 2nd Sep 1937 | Box 116 \ 1 scan0134 | |
| Letter to M. Wilks of The Rover Company Ltd. concerning crankshaft lubrication and the loan of a 20 HP car. | 3rd Sep 1937 | Box 116 \ 1 scan0135 | |
| Notes from a visit by a Rover Co. representative regarding engine bearing troubles and engine specifications. | 1st Sep 1937 | Box 116 \ 1 scan0136 | |
| Specifications for crankcase, oil pump, and connecting rod including dimensions and weights. | 1st Sep 1937 | Box 116 \ 1 scan0137 | |
| Note discussing tappet scuffing issues and comparing them to problems on the Wraith model. | 1st Sep 1937 | Box 116 \ 1 scan0138 | |
| Photograph displaying a vertical shaft with a helical gear, a cylindrical mesh filter, and a connecting rod. | 1st Sep 1937 | Box 116 \ 1 scan0139 | |
| Photograph of an engine crankcase, showing the main bearing journals. | 1st Sep 1937 | Box 116 \ 1 scan0140 | |
| Photograph of a crankshaft. | 25th Aug 1937 | Box 116 \ 1 scan0141 | |
| Table of oil flow test results for a 20 HP engine. | 25th Aug 1937 | Box 116 \ 1 scan0142 | |
| Specification sheet detailing the diameters and areas of oil ways for a 20 HP engine. | 24th Aug 1937 | Box 116 \ 1 scan0143 | |
| Specification for Nickel Chrome Molybdenum steel for forgings and crankshafts. | 20th Mar 1934 | Box 116 \ 1 scan0144 | |
| Technical drawing of an intermediate and rear main bearing, bottom half. | 10th Jul 1936 | Box 116 \ 1 scan0145 | |
| Blueprint for a front main bearing, bottom half. | 8th Mar 1926 | Box 116 \ 1 scan0146 | |
| Blueprint of an oil pump wheel driver. | 22th Sep 1934 | Box 116 \ 1 scan0147 | |
| Drawing of a driven oil pump wheel made from Duralamin. | 22th Sep 1934 | Box 116 \ 1 scan0148 | |
| Blueprint for an oil pump cover. | 4th Nov 1940 | Box 116 \ 1 scan0149 | |
| Blueprint for an oil pump and distributor driving shaft. | 22th Aug 1935 | Box 116 \ 1 scan0150 | |
| Blueprint drawing of an oil filter assembly. | 12th Oct 1934 | Box 116 \ 1 scan0151 | |
| Blueprint for an Oil Pump Body. | 24th Nov 1925 | Box 116 \ 1 scan0152 | |
| Letter to The Rover Motor Co. Ltd. regarding the dispatch of bearings and materials for connecting rods. | 13th Sep 1937 | Box 116 \ 1 scan0153 | |
| The despatch of bearings and liners to the Rover Motor Co. Ltd. | 14th Sep 1937 | Box 116 \ 1 scan0154 | |
| Letter to The Rover Motor Car Co. regarding the supply and fitting of engine bearing materials. | 17th Sep 1937 | Box 116 \ 1 scan0155 | |
| Letter from The Rover Company Ltd regarding Aluminium-Tin Alloy Bearings, crankshafts, and shims. | 15th Sep 1937 | Box 116 \ 1 scan0156 | |
| Follow-up letter to The Rover Motor Co. Ltd. regarding the testing of supplied Aluminium-tin bearings. | 27th Oct 1937 | Box 116 \ 1 scan0157 | |
| Letter from The Rover Company Ltd regarding a delay in fitting Aluminium Tin Bearings. | 28th Oct 1937 | Box 116 \ 1 scan0158 | |
| Letter from The Rover Company Ltd regarding a delay in bench tests for Aluminium Tin Alloy Bearings. | 3rd Nov 1937 | Box 116 \ 1 scan0159 | |
| Letter to The Rover Co. Ltd. regarding a delay in testing Aluminium-tin bearings. | 10th Nov 1937 | Box 116 \ 1 scan0160 | |
| Letter to T.D. Wishart of Crossley Motors regarding a newly developed bearing alloy. | 15th Aug 1938 | Box 116 \ 1 scan0161 | |
| Letter from Crossley Motors regarding problems with oil engine bearings. | 18th Aug 1938 | Box 116 \ 1 scan0162 | |
| Letter to Crossley Motors regarding a meeting to demonstrate the results of bearing alloy development work. | 19th Aug 1938 | Box 116 \ 1 scan0163 | |
| Letter from Crossley Motors Ltd. to arrange a visit to view a new bearing alloy. | 22th Aug 1938 | Box 116 \ 1 scan0164 | |
| Letter to W.O. Taylor of Crossley Motors Ltd. suggesting a date for a visit and lunch. | 23th Aug 1938 | Box 116 \ 1 scan0165 | |
| Letter from Crossley Motors Ltd to Mr. Robotham regarding a meeting arrangement. | 25th Aug 1938 | Box 116 \ 1 scan0166 | |
| Letter to Crossley Motors Ltd. regarding a special bearing material, clearances, and big-end bearing grooving. | 19th Sep 1938 | Box 116 \ 1 scan0167 | |
| Recommendation concerning holes in the crank pin and big end bearing. | 19th Sep 1938 | Box 116 \ 1 scan0168 | |
| Letter to J. Devereux of High Duty Alloys Ltd. regarding bearing material and proposed tests with Rover and Vauxhall. | 23th Jul 1937 | Box 116 \ 2 scan0001 | |
| Letter from High Duty Alloys Ltd. regarding bearing material testing and sales collaboration with other firms. | 26th Jul 1937 | Box 116 \ 2 scan0002 | |
| Typed letter from W.C. Devereux to W.A. Robotham regarding co-operation and scheduling a meeting. | 26th Jul 1937 | Box 116 \ 2 scan0003 | |
| Letter from High Duty Alloys Ltd. regarding meetings about bearings and the success of R.R.56 material on a cast crankshaft. | 27th Jul 1937 | Box 116 \ 2 scan0004 | |
| Letter from The Standard Motor Co. Ltd. discussing experiments with V-8 engine components and bearing materials. | 26th Jul 1937 | Box 116 \ 2 scan0005 | |
| Letter to W.C. Devereux of High Duty Alloys Ltd. regarding a collaboration on bearings for the motor industry. | 28th Jul 1937 | Box 116 \ 2 scan0006 | |
| Letter to Mr. Devereux of High Duty Alloys Ltd. arranging a visit for two engineers. | 29th Jul 1937 | Box 116 \ 2 scan0007 | |
| Letter from High Duty Alloys Ltd. regarding the availability of an engineer to discuss Bearing Metals. | 31th Jul 1937 | Box 116 \ 2 scan0008 | |
| Letter from High Duty Alloys Ltd. to Mr. Robotham regarding bearing material development and collaborations. | 20th Aug 1937 | Box 116 \ 2 scan0009 | |
| Letter to George Robinson of The Associated Equipment Co. Ltd. regarding the development of Aluminium Alloy Bearings. | 20th Aug 1937 | Box 116 \ 2 scan0010 | |
| Letter from High Duty Alloys to Dennis Bros. Ltd. regarding aluminium alloy bearing materials. | 20th Aug 1937 | Box 116 \ 2 scan0011 | |
| Letter from Dennis Brothers Ltd. to High Duty Alloys Ltd. discussing the use of aluminium alloy for bearings. | 19th Aug 1937 | Box 116 \ 2 scan0012 | |
| Letter to Mr. Devereux of High Duty Alloys Ltd. arranging a meeting in Derby to discuss bearings. | 21th Aug 1937 | Box 116 \ 2 scan0013 | |
| Letter reporting a serious injury caused by a sharp edge on a Bentley Park Ward body door. | 23th Aug 1937 | Box 116 \ 2 scan0014 | |
| Letter from High Duty Alloys Ltd. regarding an enclosure from Germ Lubricants Ltd. | 24th Aug 1937 | Box 116 \ 2 scan0015 | |
| Letter from Germ Lubricants Ltd. requesting samples of a special aluminium alloy used for Bentley car bearings from High Duty Alloys Ltd. | 23th Aug 1937 | Box 116 \ 2 scan0016 | |
| Letter from High Duty Alloys Ltd. concerning characteristic cracking in the front tyres of the sender's car and a friend's Bentley. | 31th Aug 1937 | Box 116 \ 2 scan0017 | |
| Cover letter to High Duty Alloys enclosing recommendations sent to the Rover Co. regarding R.R. alloy big-end bearings. | 1st Sep 1937 | Box 116 \ 2 scan0018 | |
| Letter from High Duty Alloys Ltd. to W.A. Robotham regarding recommendations for the Rover Company and a planned trip to Germany. | 2nd Sep 1937 | Box 116 \ 2 scan0019 | |
| Letter to V.W. Pilkington of Leyland Motors regarding a new arrangement for bearing materials and a proposed factory visit. | 2nd Sep 1937 | Box 116 \ 2 scan0020 | |
| The second page of a letter addressed to V.W. Pilkington, Esq. from W.C. Devereux. | 2nd Sep 1937 | Box 116 \ 2 scan0021 | |
| Letter from High Duty Alloys Ltd. regarding a letter from the Institution of Automobile Engineers. | 16th Sep 1937 | Box 116 \ 2 scan0022 | |
| Letter from W.C. Devereux to C.C. Williams regarding a supply of Bearing Alloy for testing. | 16th Sep 1937 | Box 116 \ 2 scan0023 | |
| Letter from The Institution of Automobile Engineers proposing tests on an aluminium-tin bearing alloy. | 8th Sep 1937 | Box 116 \ 2 scan0024 | |
| Letter from High Duty Alloys Ltd. regarding work on Bearing Alloys and coordinating meetings with other firms. | 16th Sep 1937 | Box 116 \ 2 scan0025 | |
| Letter from High Duty Alloys to Leyland Motors arranging a visit regarding a new aluminium alloy bearing metal. | 16th Sep 1937 | Box 116 \ 2 scan0026 | |
| Copy of a letter from Leyland Motors to High Duty Alloys regarding a new aluminium alloy bearing metal and a proposed meeting. | 14th Sep 1937 | Box 116 \ 2 scan0027 | |
| Letter from High Duty Alloys Ltd. discussing the need for an agreed procedure when dealing with customers. | 17th Sep 1937 | Box 116 \ 2 scan0028 | |
| Letter to W.C. Devereux regarding tyres, bearing metal, and a meeting with Leylands. | 20th Sep 1937 | Box 116 \ 2 scan0029 | |
| Letter from High Duty Alloys Ltd. regarding arrangements for a meeting with Leylands. | 21th Sep 1937 | Box 116 \ 2 scan0030 | |
| Cover letter from High Duty Alloys Ltd. enclosing correspondence with the Associated Equipment Company Ltd. | 21th Sep 1937 | Box 116 \ 2 scan0031 | |
| Letter to C.D. Robinson regarding a new bearing alloy which performs better than R.R.56, and arranging a meeting to discuss design modifications. | 21th Sep 1937 | Box 116 \ 2 scan0032 | |
| Copy of a letter from The Associated Equipment Co. to High Duty Alloys Ltd. discussing aluminium and new bearing materials. | 17th Sep 1937 | Box 116 \ 2 scan0033 | |
| Letter to W.C. Devereux of High Duty Alloys Ltd. acknowledging correspondence and confirming a meeting. | 22th Sep 1937 | Box 116 \ 2 scan0034 | |
| Letter discussing tyre wear, noise characteristics, and the replacement of India tyres with Dunlops. | 29th Sep 1937 | Box 116 \ 2 scan0035 | |
| Letter from High Duty Alloys Ltd. regarding the supply of aluminium alloy bearings for Dennis Bros. | 9th Oct 1937 | Box 116 \ 2 scan0036 | |
| Letter to High Duty Alloys Ltd. regarding prints for Dennis bearings and arranging a follow-up meeting. | 16th Oct 1937 | Box 116 \ 2 scan0037 | |
| Letter from High Duty Alloys Ltd. inquiring about the despatch date for bearings to the Leyland Co. | 16th Oct 1937 | Box 116 \ 2 scan0038 | |
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