| Description | Date | Identifier | |
| Order for a 2oz. bobbin of 'Ferry' 24 S.W.G. resistance wire. | 7th Oct 1931 | Box 168a \ 3 img438 | |
| Request to obtain a recently issued catalogue for C.A.V. Bosch compensated voltage control dynamos. | 12th Oct 1937 | Box 168a \ 3 img439 | |
| Requesting a C.A.V. Bosch catalogue for compensated voltage control dynamos. | 12th Oct 1937 | Box 168a \ 3 img440 | |
| Dynamo for the Phantom III in relation to the new overdrive gearbox. | 13th Oct 1937 | Box 168a \ 3 img441 | |
| Dynamo for the Phantom III model in relation to the over-drive gearbox. | 13th Oct 1937 | Box 168a \ 3 img442 | |
| Illegible document due to extremely poor image quality. | 15th Oct 1937 | Box 168a \ 3 img443 | |
| Letter from C.A.V. - Bosch Limited regarding a catalogue for compensated voltage control dynamos. | 15th Oct 1937 | Box 168a \ 3 img444 | |
| Suggestion to reduce cost and fix a shearing pin issue on the Wraith III dynamo suspension. | 21th Dec 1937 | Box 168a \ 3 img445 | |
| Recurring dynamo failure on car 25.G.VI. | 11th Jan 1938 | Box 168a \ 3 img446 | |
| Outlining the two primary causes for faulty dynamos on the Phantom III. | 17th Jan 1938 | Box 168a \ 3 img447 | |
| Low safety margin of a new open type dynamo armature fuse on the Phantom III and suggesting an increased capacity. | 19th Jan 1938 | Box 168a \ 3 img448 | |
| Instruction to forward a Bentley dynamo and control box to Vandervell Products Ltd for experimental use. | 21th Jan 1938 | Box 168a \ 3 img449 | |
| Appropriate gauge of fuse wire for the Dynamo Armature Circuit. | 26th Jan 1938 | Box 168a \ 3 img450 | |
| Causes of dynamo failures on the Phantom III and proposed modifications. | 26th Jan 1938 | Box 168a \ 3 img451 | |
| Source of Phantom III dynamo failures and comparing them to Bentley vehicles. | 26th Jan 1938 | Box 168a \ 3 img452 | |
| Causes and potential solutions for dynamo failures on the Phantom III model. | 26th Jan 1938 | Box 168a \ 3 img453 | |
| Faulty dynamos causing excessive sparking on specific chassis models. | 28th Jan 1938 | Box 168a \ 3 img454 | |
| Letter from J. Stone & Company regarding the suitability of different types of Automatic Carbon Pile Regulators for use in vehicles. | 28th Jan 1938 | Box 168a \ 3 img455 | |
| Letter from J. Stone & Company, Limited, discussing M and H type regulators for buses and aircraft. | 28th Jan 1938 | Box 168a \ 3 img456 | |
| Requesting the correct arrangement of dynamos between two cars after an engine swap. | 29th Jan 1938 | Box 168a \ 3 img457 | |
| Comparison of Phantom III and Bentley dynamos, discussing regulator failures and statistics. | 2nd Feb 1938 | Box 168a \ 3 img458 | |
| Potential causes of dynamo trouble, such as sticking and erratic regulators. | 26th Jan 1938 | Box 168a \ 3 img459 | |
| Scheme to address noisy dynamos produced by unlubricated C.E. bearings. | 5th Feb 1938 | Box 168a \ 3 img460 | |
| Scheme addressing complaints of noisy dynamos by improving bearing lubrication and cover design. | 5th Feb 1938 | Box 168a \ 3 img461 | |
| Suitability and performance of a small dynamo for the Phantom III model. | 5th Feb 1938 | Box 168a \ 3 img462 | |
| Letter to J. Stone & Co. Ltd. regarding a tentative enquiry for a regulator to be fitted on an experimental car. | 5th Feb 1938 | Box 168a \ 3 img463 | |
| Specification data for a dynamo regulator. | 8th Feb 1938 | Box 168a \ 3 img464 | |
| Letter from M.C.L. and Repetition Ltd offering to manufacture dynamos, starters, and other electrical equipment. | 8th Feb 1938 | Box 168a \ 3 img465 | |
| Letter from M.C.L. and Repetition Ltd. proposing the supply of a 5' Dynamo. | 8th Feb 1933 | Box 168a \ 3 img466 | |
| Dynamo bearing failure during endurance testing and a request for repair and part transfer. | 10th Feb 1938 | Box 168a \ 3 img467 | |
| Consequences of fitting a new-type armature to the Phantom dynamo, including the necessary changes to poles, coils and brush gear. | 10th Feb 1938 | Box 168a \ 3 img468 | |
| Proposing the production and fitting of new armatures to address dynamo failures on the Phantom III model. | 15th Feb 1938 | Box 168a \ 3 img469 | |
| New arrangement for the Bentley 111 brush gear, using bronze instead of aluminum. | 16th Feb 1938 | Box 168a \ 3 img470 | |
| Design changes to a Phase III Dynamo with a 36 slot armature. | 28th Feb 1938 | Box 168a \ 3 img471 | |
| Scheme to try a new 36 slot dynamo armature for the Wraith III and Bentley III models to increase output. | 4th Mar 1938 | Box 168a \ 3 img472 | |
| Requesting the replacement of a burnt-out dynamo for chassis 35-EX. | 4th Mar 1938 | Box 168a \ 3 img473 | |
| Request to arrange for the overhaul of a Phantom III dynamo, model L.180A, which was overloaded and may require rewinding. | 5th Mar 1938 | Box 168a \ 3 img474 | |
| Modification of a Phantom dynamo for use with a Lucas regulator. | 7th Mar 1938 | Box 168a \ 3 img475 | |
| The endurance test of a 36 slot armature dynamo. | 10th Mar 1938 | Box 168a \ 3 img476 | |
| Report on standardising the dynamo on the Phantom III model, considering its cutting-in speed. | 10th Mar 1938 | Box 168a \ 3 img477 | |
| Concluding that the standardisation of a machine should proceed based on anticipated performance changes. | 10th Mar 1938 | Box 168a \ 3 img478 | |
| Specifications for two new field windings for the Phantom III dynamo to increase resistance. | 12th Mar 1938 | Box 168a \ 3 img479 | |
| Request to order parts for a 5' Diameter, 36 Slot Dynamo Armature for Wraith, 25/30 HP, and Bentley models. | 14th Mar 1938 | Box 168a \ 3 img480 | |
| Workable dynamo ratio for the Phantom lll machine. | 15th Mar 1938 | Box 168a \ 3 img481 | |
| Dynamo ratio and proposed changes for the Phantom III. | 15th Mar 1938 | Box 168a \ 3 img482 | |
| Modifications to the Dynamo for the Wraith III and Bentley III models to accommodate a new brush gear. | 18th Mar 1938 | Box 168a \ 3 img483 | |
| Provision of blueprints for a 5' Dynamo 36-slot armature for Wraith, 25/30 HP, and Bentley models. | 23th Mar 1938 | Box 168a \ 3 img484 | |
| Performance graph plotting dynamo RPM against Amperes output, showing cold and warm curves. | 19th May 1930 | Box 168a \ 3 img485 | |
| Letter to M C L and Repetition Ltd. regarding the incompatibility of their dynamo design with current requirements. | 19th Mar 1938 | Box 168a \ 3 img486 | |
| Letter regarding a quotation for dynamos and arranging a meeting for preliminary discussions. | 21th Mar 1938 | Box 168a \ 3 img487 | |
| Modifications to increase the Phantom III dynamo speed and the consequent alterations to other components. | 5th Apr 1938 | Box 168a \ 3 img488 | |
| Requesting modifications and road tests for a special dynamo and regulator for car 35.EX. | 12th Apr 1938 | Box 168a \ 3 img489 | |
| Alternatives to achieve the desired field winding resistance for a PH.III Dynamo. | 20th Apr 1938 | Box 168a \ 3 img490 | |
| Letter to M.C.L. & Repetition Ltd. regarding the supply of starter motors and dynamos. | 20th Apr 1938 | Box 168a \ 3 img491 | |
| Letter from M.C.L. and Repetition Ltd arranging a visit to discuss electrical equipment. | 22th Apr 1938 | Box 168a \ 3 img492 | |
| Specifications for a test field winding for a Phantom III dynamo. | 28th Apr 1938 | Box 168a \ 3 img493 | |
| Request for a set of parts for a Bentley 50 Dynamo, listing components for the armature and bearing brackets. | 23th Apr 1938 | Box 168a \ 3 img494 | |
| List of parts and instructions for Commutator and Frame/Field Winding assemblies. | 5th May 1938 | Box 168a \ 3 img495 | |
| The required overhauling and repair work for electrical units removed from car 26.G.VI. | 5th May 1938 | Box 168a \ 3 img496 | |
| Instructions for the assembly and testing of two 36 slot dynamos for the Wraith model. | 7th May 1938 | Box 168a \ 3 img497 | |
| Design for a Lucas dynamo for a C.I. engine, including an inquiry about the preferred pulley construction. | 9th May 1938 | Box 168a \ 3 img498 | |
| Alteration of dynamo field connections on a Wraith III No.4 Unit for endurance testing. | 13th May 1938 | Box 168a \ 3 img499 | |
| Experimental instructions for assembling a 36 Slot Armature for Wraith and Bentley models for testing. | 17th May 1938 | Box 168a \ 3 img500 | |
| Letter from M.C.L. and Repetition Ltd confirming a recent meeting and discussing potential supply of dynamos and other electrical equipment. | 17th May 1938 | Box 168a \ 3 img501 | |
| Continuation sheet detailing electrical components such as starter switches, switchboards, and cutout units. | 25th May 1938 | Box 168a \ 3 img502 | |
| Requesting tests on the wear of dynamo bearings by fitting two new ones. | 25th May 1938 | Box 168a \ 3 img503 | |
| Photograph showing wear on the teeth of a Lucas type flywheel after 25,000 starts. | 27th Mar 1941 | Box 168a \ 3 img504 | |
| Dynamo failure due to a worn-out brush, including mileage data. | 27th Mar 1941 | Box 168a \ 3 img505 | |
| Urgent request to perform a simple machine operation on the B.40 Dynamo pulley. | 8th Jan 1941 | Box 168a \ 3 img506 | |
| Letter from Joseph Lucas Ltd. regarding a C5HV type dynamo as fitted to Lagonda cars. | 19th Sep 1940 | Box 168a \ 3 img507 | |
| Letter to Lucas Ltd. regarding dynamos, vacuum units, and a C.A.V. catalogue. | 8th Oct 1940 | Box 168a \ 3 img508 | |
| Letter to Joseph Lucas Ltd. inquiring about the availability of a stock dynamo and a vacuum unit for a distributor. | 24th Sep 1940 | Box 168a \ 3 img509 | |
| Advertisement for an Ilford Exposure Photometer, a precision instrument for photographers and illuminating engineers. | 24th Sep 1940 | Box 168a \ 3 img510 | |
| Instruction manual for the SEI Exposure Photometer. | 24th Sep 1940 | Box 168a \ 3 img511 | |
| Instruction manual page for a photometer or exposure meter, detailing camera exposures and maintenance. | 24th Sep 1940 | Box 168a \ 3 img512 | |
| Product brochure for the SEI Photometer and accessories for densitometry. | 24th Sep 1940 | Box 168a \ 3 img513 | |
| Instruction manual for the S.E.I. Photometer and its accessories for densitometry. | 24th Sep 1940 | Box 168a \ 3 img514 | |
| Instruction manual page on how to set up the S.E.I. Photometer to measure the densities of transparencies. | 24th Sep 1940 | Box 168a \ 3 img515 | |
| Instructions for measuring the reflection density of photographic negatives and prints. | 24th Sep 1940 | Box 168a \ 3 img516 | |
| Page detailing the electrical connections and maintenance for a Densitometer Illuminator. | 1st May 1950 | Box 168a \ 3 img517 | |
| Guide to the external supply adaptor lamp, illuminator lamp, mounting, and calibration for a photometer. | 1st May 1950 | Box 168a \ 3 img518 | |
| Advertisement for the SEI Exposure Photometer. | 1st May 1950 | Box 168a \ 3 img519 | |
| Table of contents for the S.E.I. Photometer manual. | 1st May 1950 | Box 168a \ 3 img520 | |
| Working instructions for the SEI Exposure Photometer for estimating camera exposures. | 1st May 1950 | Box 168a \ 3 img521 | |
| Instructions for determining camera exposures using a photometric device and its principles of construction. | 1st May 1950 | Box 168a \ 3 img522 | |
| Photographic comparison of an eagle statuette demonstrating the effect of background brightness on exposure readings. | 1st May 1950 | Box 168a \ 3 img523 | |
| Guide on photographic exposure corrections, with sections on copying and projection printing techniques. | 1st May 1950 | Box 168a \ 3 img524 | |
| Guide on photometer usage, brightness units, and exposure estimation. | 1st May 1950 | Box 168a \ 3 img525 | |
| Page from a publication demonstrating photographic exposure methods for scenes with high contrast. | 1st May 1950 | Box 168a \ 3 img526 | |
| Manual page explaining photography techniques for industrial and controlled lighting using an S.E.I. photometer. | 1st May 1950 | Box 168a \ 3 img528 | |
| Comparison of landscape photography techniques showing improved rendering of clouds and colour brightness. | 7th Jul 1953 | Box 168a \ 3 img529 | |
| Letter from Ilford Limited responding to an enquiry about a S.E.I. Photometer. | 7th Jul 1953 | Box 168a \ 3 img530 | |
| Lucas Dynamo Mounting for the B.80 engine. | 23th Feb 1940 | Box 168a \ 3 img531 | |
| List of blueprints and component details for the Wraith III model, scheme RR.Sch.1073. | 20th May 1937 | Box 168a \ 4 img001 | |
| The distribution of blueprints and tracings for standard and experimental parts. | 20th May 1937 | Box 168a \ 4 img002 | |
| Minutes from a Coachwork Conference discussing aero glass, driving visibility, and new headlamps. | 21th May 1937 | Box 168a \ 4 img003 | |
| Updates on lamps, bonnets, door locks, sound insulation, radiator shutters, and chassis prints. | 21th May 1937 | Box 168a \ 4 img004 | |
| Updates and proposed changes for Phantom III and Bentley components. | 21th May 1937 | Box 168a \ 4 img005 | |
| Meeting notes discussing snow chains, finishing instructions, and petrol filters. | 24th May 1937 | Box 168a \ 4 img006 | |
| Testing report on improved Lucas voltage regulator and headlamp footswitch for the Wraith specification. | 24th May 1937 | Box 168a \ 4 img007 | |
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