| Description | Date | Identifier | |
| Defective ammeter on a Bentley B.118.JD which caused a blackout due to bad workmanship. | 1st Sep 1937 | Box 168 \ 5 img325 | |
| The failure of a defective ammeter from Chassis No. B.116.JD. | 10th Sep 1937 | Box 168 \ 5 img326 | |
| Proposing a two-stage plan to improve faulty ammeters in collaboration with Weston Electrical. | 28th Sep 1937 | Box 168 \ 5 img327 | |
| Suggestion for a new supplier to produce ammeter components to avoid previous issues and tool charges. | 28th Sep 1937 | Box 168 \ 5 img328 | |
| Modification and repair of ammeters supplied by the Weston Electrical Instrument Co. | 13th Oct 1937 | Box 168 \ 5 img329 | |
| The procurement and testing of a new pattern of ammeters with specific modifications. | 13th Oct 1937 | Box 168 \ 5 img330 | |
| The failure of ammeters on chassis MRO-5, 3-BT-51, and 3-BT-111, with subsequent handwritten notes. | 13th Oct 1937 | Box 168 \ 5 img331 | |
| Internal instruction regarding the electrical inspection of ammeters from the Weston Electrical Instrument Co. Ltd. | 16th Oct 1937 | Box 168 \ 5 img332 | |
| Instruction to arrange for modified standard ammeters to be fitted to cars 32-EX, 39-IX, and G-S-IV. | 3rd Nov 1937 | Box 168 \ 5 img333 | |
| Confirmation memo regarding the handover of a Lucas Ammeter for trial fitting and potential standardization. | 4th Nov 1937 | Box 168 \ 5 img334 | |
| Confirming the handover of a Lucas Ammeter for testing purposes. | 12th Nov 1937 | Box 168 \ 5 img335 | |
| Complete failure of Weston ammeters due to terminal screw breakage and a proposed action plan for examination and replacement. | 25th Nov 1937 | Box 168 \ 5 img336 | |
| Failure and replacement of ammeters, and a supply shortage due to the supplier moving factory. | 3rd Dec 1937 | Box 168 \ 5 img337 | |
| Letter to Joseph Lucas Ltd. detailing the results of preliminary bench tests on three ammeters. | 8th Dec 1937 | Box 168 \ 5 img338 | |
| Letter concluding that instruments passed an insulation test. | 8th Dec 1937 | Box 168 \ 5 img339 | |
| Confirming instructions to replace all Phantom III ammeters and conduct related checks on the starter switch. | 8th Dec 1937 | Box 168 \ 5 img340 | |
| Requesting the overhaul and repair of a Weston D.C. Ammeter. | 8th Dec 1937 | Box 168 \ 5 img341 | |
| Requesting the dispatch of a Weston Ammeter for overhaul and repair. | 9th Dec 1937 | Box 168 \ 5 img342 | |
| Investigation and test report on Lucas ammeters. | 11th Dec 1937 | Box 168 \ 5 img343 | |
| Performance testing of a Lucas Ammeter. | 11th Dec 1937 | Box 168 \ 5 img344 | |
| Summary of test results for Lucas Ammeters, noting issues with pointer sticking and zero error. | 11th Dec 1937 | Box 168 \ 5 img345 | |
| Return of two faulty Lucas Ammeters to the manufacturer due to sticking needles. | 15th Dec 1937 | Box 168 \ 5 img346 | |
| Need for assurance on Lucas Ammeters to ensure they are free from previously outlined faults. | 17th Dec 1937 | Box 168 \ 5 img347 | |
| Requesting the dispatch of two faulty Lucas Ammeters for examination due to sticking needles. | 17th Dec 1937 | Box 168 \ 5 img348 | |
| Initiating a standardisation sheet for a Lucas ammeter and a petrol pump switch for various car models. | 4th Jan 1938 | Box 168 \ 5 img349 | |
| Request to replace a Weston Ammeter with a Lucas ammeter on chassis No.B.56.BN. | 5th Jan 1938 | Box 168 \ 5 img350 | |
| Issues with the current ammeter and proposing a switch to the Lucas Ammeter for Bentley and B.50 cars. | 7th Jan 1938 | Box 168 \ 5 img351 | |
| Depot sheet discussing issues and modifications to the Armature Fuse on the Phantom III model. | 27th Jan 1938 | Box 168 \ 5 img352 | |
| Request to return a faulty Lucas Ammeter to the makers for repair due to a sticking complaint. | 31th Jan 1938 | Box 168 \ 5 img353 | |
| Letter to Joseph Lucas Ltd. regarding a persistent sticking pointer issue on an ammeter. | 31th Jan 1938 | Box 168 \ 5 img354 | |
| Return of a faulty sticking Lucas Ammeter to Messrs Lucas for repair. | 1st Feb 1938 | Box 168 \ 5 img355 | |
| Owner's complaint report about a car failure due to a blown fuse and the proposed solution. | 12th Dec 1936 | Box 168 \ 5 img356 | |
| Brief and fragmented internal memo regarding an absence. | 22th Dec 1936 | Box 168 \ 5 img357 | |
| Fitting special Weston ammeters to cars 11.B.V. and 12.B.V. | 13th Jun 1939 | Box 168 \ 5 img358 | |
| Requesting the replacement of an old ammeter with a modified Lucas ammeter on car 14.B.V. for testing in France. | 23th Jun 1939 | Box 168 \ 5 img359 | |
| Testing of experimental Lucas ammeters with modified movements to eliminate 'sticking'. | 4th Jul 1939 | Box 168 \ 5 img360 | |
| The proposal to order half a dozen Lucas ammeters with modified movement for testing. | 7th Jul 1939 | Box 168 \ 5 img361 | |
| Requesting an order of six Lucas DB.2562 ammeters for testing on experimental chassis. | 18th Jul 1939 | Box 168 \ 5 img362 | |
| Letter to Arcade Wireless Stores regarding the return of a drawing for a Milliammeter and the requirement for a DC Micro-Ammeter. | 26th Aug 1940 | Box 168 \ 5 img363 | |
| The failure analysis and repair of a sticking Lucas B.M. type ammeter. | 28th Apr 1941 | Box 168 \ 5 img364 | |
| Implementation of concave lighting for Bentley instruments to address issues with visible flaws in the instrument glass. | 1st Apr 1935 | Box 168a \ 1 img001 | |
| Concave lighting and definitive glasses for instruments on Bentley chassis. | 2nd Mar 1935 | Box 168a \ 1 img002 | |
| Design of an instrument board for the Spectre and Wraith models, focusing on instrument grouping around a central speedometer and sourcing an electric clock. | 4th Apr 1935 | Box 168a \ 1 img003 | |
| The design considerations for implementing concave lighting on Bentley instruments. | 4th Apr 1935 | Box 168a \ 1 img004 | |
| Implementation of concave lighting for Bentley instruments following its introduction on Rolls-Royce cars. | 1st Apr 1935 | Box 168a \ 1 img005 | |
| Requisition for a complete set of 20/25 chassis instruments with specifications for the petrol gauge and speedometer. | 8th Apr 1935 | Box 168a \ 1 img006 | |
| Instrument layout for a new model, specifically the speedometer and clock. | 8th Apr 1935 | Box 168a \ 1 img007 | |
| Requesting to post a rev counter to A.T. Speedometer Co. Ltd. for experimental testing. | 11th Apr 1935 | Box 168a \ 1 img008 | |
| Requesting the development of a lighting scheme for Bentley instruments with concave dials. | 13th Apr 1935 | Box 168a \ 1 img009 | |
| The delivery and fitting schedule for new concave lit instruments from Smith & Sons for various chassis. | 16th Apr 1935 | Box 168a \ 1 img010 | |
| Letter to Mr. B. Haviland declining an invitation and discussing experiments with concave dial instruments. | 30th Apr 1935 | Box 168a \ 1 img011 | |
| Letter to S. Smith & Sons Ltd. regarding unsatisfactory results and failures of concave dial instruments being tested on a 40/50 chassis. | 18th May 1935 | Box 168a \ 1 img012 | |
| Letter from S. Smith & Sons regarding the failure of sample Concave Dial Instruments due to vibration. | 20th May 1935 | Box 168a \ 1 img013 | |
| List of parts and details for the instrument board of 'Spectre IV', R.R. Scheme 857. | 31th May 1935 | Box 168a \ 1 img014 | |
| Return of two faulty concave dial instruments removed from experimental cars. | 12th Jun 1935 | Box 168a \ 1 img015 | |
| Letter from S. Smith & Sons regarding the rectification of returned concave dial instruments and an issue with an oil gauge. | 14th Jun 1935 | Box 168a \ 1 img016 | |
| Structural and spatial issues of a proposed Bentley instrument scheme with concave dials. | 27th Jun 1935 | Box 168a \ 1 img017 | |
| Deferral of work on Bentley instruments with concave dials. | 8th Aug 1930 | Box 168a \ 1 img018 | |
| Letter proposing a patented scheme to automatically switch the horn button to operate the headlamps during silent zones. | 2nd Jul 1935 | Box 168a \ 1 img019 | |
| Letter from S. Smith & Sons regarding a horn scheme drawing and an instrument for indicating engine sump oil condition. | 5th Jul 1935 | Box 168a \ 1 img020 | |
| Letter from S. Smith & Sons Ltd to H.E. West arranging a proposed visit. | 8th Jul 1935 | Box 168a \ 1 img021 | |
| Letter to Mr. C.W. Nichols of Messrs. S. Smith & Sons, Ltd. regarding a future meeting arrangement. | 9th Jul 1935 | Box 168a \ 1 img022 | |
| Letter from S. Smith & Sons regarding a visit and an Oil Testing Instrument. | 10th Jul 1935 | Box 168a \ 1 img023 | |
| Letter to Mr. C.W. Nichols arranging a visit and a meeting with the Air Ministry. | 13th Jul 1935 | Box 168a \ 1 img024 | |
| Letter thanking Joseph Lucas Research Laboratories for their help with cold starting tests. | 19th Jul 1935 | Box 168a \ 1 img025 | |
| Letter from Joseph Lucas Research Laboratories enclosing a refrigerator test report and requesting starter torque figures. | 22th Jul 1935 | Box 168a \ 1 img026 | |
| Letter from S. Smith & Sons (Motor Accessories) Ltd discussing the design, pricing, and potential standardisation of watches for car models. | 2nd Aug 1935 | Box 168a \ 1 img027 | |
| Letter from S. Smith & Sons suggesting the use of their satisfactory Electric Clock. | 2nd Aug 1935 | Box 168a \ 1 img028 | |
| Letter to Joseph Lucas Ltd. returning an ice room test report with additional details. | 8th Aug 1935 | Box 168a \ 1 img029 | |
| Request to produce an instrument patch for the 'Spectre' instrument board, including a detailed list of parts required. | 1st Oct 1935 | Box 168a \ 1 img030 | |
| Requesting blueprints for an inspection lamp plug for the Phantom III instrument board. | 30th Oct 1935 | Box 168a \ 1 img031 | |
| Wiring alterations for the 25/29 HP Chassis instrument board due to the introduction of the big bore engine. | 13th Dec 1935 | Box 168a \ 1 img032 | |
| Instructions to introduce a green warning light for a simplified petrol system on the 25/30 HP Chassis. | 17th Dec 1935 | Box 168a \ 1 img033 | |
| Invoice from S.Smith & Sons for a meter and generator, requesting authorisation for payment. | 13th Dec 1935 | Box 168a \ 1 img034 | |
| The payment status of an invoice from S. Smith & Sons (M.A) Ltd. | 9th Jan 1936 | Box 168a \ 1 img035 | |
| Standardisation of an instrument board to accommodate a headlamp dip indicator and petrol reserve warning lamp. | 16th Aug 1935 | Box 168a \ 1 img036 | |
| Estimate for the cost of extra jigs and tools required for the 'G' series chassis production. | 24th May 1935 | Box 168a \ 1 img037 | |
| Letter from S. Smith & Sons discussing blueprints for a new 25/30 HP model. | 1st Feb 1936 | Box 168a \ 1 img038 | |
| Standardisation Sheet X.No.135 detailing refusal to sign due to the increased cost of the Smith's Empire Electric Clock. | 7th Feb 1936 | Box 168a \ 1 img039 | |
| Changing indicator discs for the warning lights on the 25/30 HP Bentley and Phantom III instrument boards. | 24th Apr 1936 | Box 168a \ 1 img040 | |
| Costs and implications of using the Phantom III instrument board on the 25/30 HP chassis. | 30th Jun 1936 | Box 168a \ 1 img041 | |
| Modifying the switchbox for the Phantom III and 25/30 chassis to simplify the ignition switch. | 24th Jun 1936 | Box 168a \ 1 img042 | |
| Instrument board layout for the 25/30 HP Chassis, specifically the speedometer. | 24th Jun 1936 | Box 168a \ 1 img043 | |
| Chromium plated bezel. | 15th Jun 1936 | Box 168a \ 1 img044 | |
| Replacement of the turret arrangement with Phantom III type control levers on the 25/30 HP Chassis. | 15th Jun 1936 | Box 168a \ 1 img045 | |
| Listing the part numbers for the instrument panel, speedometer, and petrol gauge for the 25/30 HP Chassis and Phantom III. | 16th Jun 1936 | Box 168a \ 1 img046 | |
| Introduction of Phantom III steering and controls onto the Wraith II chassis. | 16th Jun 1938 | Box 168a \ 1 img047 | |
| Letter from S. Smith & Sons confirming a meeting appointment at Hucknall. | 19th Jun 1930 | Box 168a \ 1 img048 | |
| The blueprint for a Phantom III instrument board dimmer switch. | 22th Sep 1936 | Box 168a \ 1 img049 | |
| Parts list for a trial set of a dimmer switch for instrument lights. | 5th Oct 1936 | Box 168a \ 1 img050 | |
| List of standard parts, assemblies, and manufacturing notes for specific components. | 5th Oct 1936 | Box 168a \ 1 img051 | |
| Specifications for two sets of resistance wire for a dimmer switch for instrument lights. | 12th Oct 1936 | Box 168a \ 1 img052 | |
| Parts list and request to build one Dimmer Switch for instrument lights. | 5th Nov 1936 | Box 168a \ 1 img053 | |
| Customer objection regarding the new, hard-to-locate instrument board light switch on the Phantom III model. | 25th Nov 1936 | Box 168a \ 1 img054 | |
| The re-trial and modification of an instrument board dimmer switch. | 1st Dec 1936 | Box 168a \ 1 img055 | |
| The relocation of the instrument board light switch on the Phantom III for easier accessibility. | 1st Dec 1936 | Box 168a \ 1 img056 | |
| Order for a speedometer for the Wraith II instrument board, referencing blueprint DW.168. | 4th Dec 1936 | Box 168a \ 1 img057 | |
| The performance and heating issues of an instrument board dimmer switch. | 7th Dec 1936 | Box 168a \ 1 img058 | |
| Performance and heating issues of a rewound instrument board dimmer switch. | 7th Dec 1936 | Box 168a \ 1 img059 | |
| Instrument Board dimmer switch, noting a required alteration. | 11th Dec 1936 | Box 168a \ 1 img060 | |
| | | | |
