| Description | Date | Identifier | |
| Chart detailing switchbox arrangements for various vehicle models. | 1st Mar 1929 | Box 65 \ 2 scan0027 | |
| Cover note for the Specification of Production Inspection & Test for the S.S. Switchbox for R.R. Chassis, Version 4. | 26th Apr 1929 | Box 65 \ 2 scan0028 | |
| Specification for production inspection and testing of a switchbox for the R.R. chassis. | 12th Mar 1929 | Box 65 \ 2 scan0029 | |
| Set of electrical testing procedures for a switch or distribution box. | 28th May 1929 | Box 65 \ 2 scan0030 | |
| Instructions for correcting interchanged magneto wires on a 23 Ex Switchbox. | 28th May 1929 | Box 65 \ 2 scan0031 | |
| Unsatisfactory diagrams and instructions for the S.S. Switchbox magneto switching system, which could lead to wiring errors and electric shocks. | 28th May 1929 | Box 65 \ 2 scan0032 | |
| Confirming the possibility of receiving a minor shock from the magneto switch knob. | 28th May 1929 | Box 65 \ 2 scan0033 | |
| Technical memo on the arrangements of the S.S. switchbox, comparing standard, modified, and original versions. | 7th Jul 1929 | Box 65 \ 2 scan0034 | |
| Experimental auto switch and charge control systems for chassis 20-EX. | 9th Sep 1929 | Box 65 \ 2 scan0035 | |
| Clarifying the specifications for switchboxes used with the auto charge control switch. | 9th Sep 1929 | Box 65 \ 2 scan0036 | |
| Clarifying the practice of issuing instructions for different sections to the Experimental Department. | 19th Sep 1929 | Box 65 \ 2 scan0037 | |
| Requesting to include a switchbox with extended armature contact on chassis 18-EX. | 20th Nov 1929 | Box 65 \ 2 scan0038 | |
| The fitment of a switchbox with an extended armature contact to a 40/50 Chassis 18-EX. | 22th Nov 1929 | Box 65 \ 2 scan0039 | |
| The design and examination of the Phantom II switchbox, distribution board, and fuses. | 30th Nov 1929 | Box 65 \ 2 scan0040 | |
| The condition of a switchbox after extended use and a discussion on reconsidering its design for an experimental car. | 1st Nov 1929 | Box 65 \ 2 scan0041 | |
| Recommendation to adopt the Phantom II standard switchbox and alter the fuse positions and numbering accordingly. | 30th Nov 1929 | Box 65 \ 2 scan0042 | |
| Instruction of a second S.S. Switchbox with extended armature contact and distribution board for an experimental chassis. | 12th Dec 1929 | Box 65 \ 2 scan0043 | |
| Potential for a driver to get an electric shock from the ignition switch on the Phantom II. | 1st Dec 1929 | Box 65 \ 2 scan0044 | |
| Cause and solutions for an electric shock from the auxiliary magneto switch on a Phantom II. | 9th Dec 1929 | Box 65 \ 2 scan0045 | |
| Two arrangements for magneto switching, considering alterations to eliminate an electric shock. | 9th Dec 1929 | Box 65 \ 2 scan0046 | |
| Technical proposal for modifying the reduced charge switching scheme by interconnecting it with the headlamp switch. | 8th Jan 1930 | Box 65 \ 2 scan0047 | |
| New switchbox design, focusing on the armature contact, terminal numbering, and lamp switching. | 18th Jan 1930 | Box 65 \ 2 scan0048 | |
| The disadvantages and proposed elimination of an auxiliary magneto switch. | 18th Jan 1930 | Box 65 \ 2 scan0049 | |
| Two proposals for modifying the charge switching system. | 25th Jan 1930 | Box 65 \ 2 scan0050 | |
| Proposed reduced charge switching system, detailing its operation and potential issues with the cut-out shunt coil. | 30th Jan 1930 | Box 65 \ 2 scan0051 | |
| Hand-drawn diagram illustrating four different electrical circuit configurations. | 30th Jan 1930 | Box 65 \ 2 scan0052 | |
| Proposed electrical wiring modifications involving a switchbox, distribution box, and field resistance. | 30th Jan 1930 | Box 65 \ 2 scan0053 | |
| Note on the convention for indicating windings and a reference to a scheme for utilising higher output generators. | 30th Jan 1930 | Box 65 \ 2 scan0054 | |
| Instruction to remove a green lamp unit for a 10,000-mile test and retain the switchbox for standardisation. | 7th Feb 1930 | Box 65 \ 2 scan0055 | |
| Proposals for reduced charge switching and the implications for the auxiliary magneto switch. | 8th Feb 1930 | Box 65 \ 2 scan0056 | |
| Switchbox and distribution box for the 10,000-mile chassis 23-EX. | 25th Feb 1930 | Box 65 \ 2 scan0057 | |
| The modification of a switchbox for a 40-50 HP chassis, including lists of new and standard parts required. | 17th Mar 1930 | Box 65 \ 2 scan0058 | |
| The switchbox and cutout arrangement for a dynamo charging circuit. | 11th Nov 1930 | Box 65 \ 2 scan0059 | |
| Analysis of different electrical cutout and switchbox arrangements to mitigate sparking and component failure. | 28th Nov 1929 | Box 65 \ 2 scan0060 | |
| Experimental record sheet for a switchbox with an armature contact in the ignition position. | 28th Nov 1929 | Box 65 \ 2 scan0061 | |
| Instruction sheet regarding a switchbox with an armature contact, its condition and replacement. | 10th Dec 1930 | Box 65 \ 2 scan0062 | |
| Cross-reference note for further information on the 40/50 switchbox. | 31th Dec 1930 | Box 65 \ 2 scan0063 | |
| Reference note for previous correspondence concerning the 40/50 Distribution Board. | 5th Dec 1923 | Box 65 \ 2 scan0064 | |
| Testing mileage of 40 S.W.G. field fuses for Goshawk & E.A.C. electrical systems. | 5th Dec 1923 | Box 65 \ 2 scan0065 | |
| Fusing for the electrical circuits of the silent starter gear. | 3rd Jul 1934 | Box 65 \ 2 scan0066 | |
| Accompanying a blueprint for a Distribution Board and Cut-Out, detailing differences from the standard 20 HP type. | 14th Sep 1924 | Box 65 \ 2 scan0067 | |
| Instructions regarding the testing and availability of an EAC Distribution Box and Cut-out. | 6th Jan 1925 | Box 65 \ 2 scan0068 | |
| Inspection and adjustment report for an EAC Distribution Board, including operating figures. | 5th Feb 1925 | Box 65 \ 2 scan0069 | |
| Confirming that a distribution board and cutout has passed testing and is ready for use on the chassis. | 6th Jan 1925 | Box 65 \ 2 scan0070 | |
| Cover letter for the specification of Production Inspection & Test of an EAC distribution board and cutout. | 23th Jan 1925 | Box 65 \ 2 scan0071 | |
| Specification for the production inspection, adjustment, and testing of a distribution board and cutout. | 21th Jan 1925 | Box 65 \ 2 scan0072 | |
| Testing procedures for a dynamo, detailing voltage, amperage, and cutout contact operations. | 21th Jan 1925 | Box 65 \ 2 scan0073 | |
| Wiring diagram for the connections for an EAC distribution board and cutout test. | 23th Feb 1925 | Box 65 \ 2 scan0074 | |
| Dynamo fuse information and cutout specifications. | 23th Feb 1925 | Box 65 \ 2 scan0075 | |
| Troubleshooting sticking cutout contact points and requesting inspections and corrections. | 15th Apr 1925 | Box 65 \ 2 scan0076 | |
| Requesting the replacement of a faulty distribution box on car 98-NK. | 8th Apr 1925 | Box 65 \ 2 scan0077 | |
| Issue with the rubbing action of cutout contact points in a distribution box. | 16th Apr 1925 | Box 65 \ 2 scan0078 | |
| Requesting inspection and alteration of cutout contact points on various experimental chassis. | 14th May 1925 | Box 65 \ 2 scan0079 | |
| Additional note on the production inspection and test specification for the distribution board and cutout, applicable to the 20 HP and EAC chassis. | 14th May 1925 | Box 65 \ 2 scan0080 | |
| Additional note on the production inspection and testing specification for the distribution board and cutout, focusing on contact point alignment. | 14th May 1925 | Box 65 \ 2 scan0081 | |
| Chassis 93-NK after 15,447 miles in France, focusing on electrical fittings. | 20th May 1925 | Box 65 \ 2 scan0082 | |
| Repeated failure of an emergency main fuse on an EAC trials car due to an electrical earth. | 21th May 1925 | Box 65 \ 2 scan0083 | |
| Instructing a design alteration for the EAC Distribution Box contact points. | 25th May 1925 | Box 65 \ 2 scan0084 | |
| Problem with an overly strong spring in a distribution box cut-out and proposing spring steel as an alternative material. | 27th May 1925 | Box 65 \ 2 scan0085 | |
| Replacement and allocation of three non-standard cutout contact points for specific cars. | 29th May 1925 | Box 65 \ 2 scan0086 | |
| The experimental reduction of cutout contact breaker spring necks on various chassis. | 29th May 1925 | Box 65 \ 2 scan0087 | |
| Proposing a design change to make the supporting column of the fixed cutout contact point more rigid. | 1st Jun 1925 | Box 65 \ 2 scan0088 | |
| Intended rubbing action of the spring in a distribution box cutout. | 3rd Jun 1925 | Box 65 \ 2 scan0089 | |
| Observations on spring arrangements and the necessity for a rigid support for the fixed contact. | 3rd Jun 1925 | Box 65 \ 2 scan0090 | |
| Suggestions by 'RG' for the improvement of the electrical system. | 11th Aug 1925 | Box 65 \ 2 scan0091 | |
| Inspection report on a distribution box with a cracked cover, dust ingress and worn contact points. | 14th Aug 1925 | Box 65 \ 2 scan0092 | |
| Modifications to 'V' Series electrical equipment, specifically cones and a dynamo commutator end cover. | 4th Aug 1925 | Box 65 \ 2 scan0093 | |
| Modification of two EAC distribution boards to a new experimental standard for dynamo tests. | 8th Feb 1926 | Box 65 \ 2 scan0094 | |
| Reverting to a modified shutter control design for the 'X' Series and altering dashboard components. | 14th Jul 1925 | Box 65 \ 2 scan0095 | |
| Instructing a change to the Phantom's cutout mechanism to match the simpler 20 HP design. | 1st Jun 1926 | Box 65 \ 2 scan0096 | |
| The performance of modified distribution box thumbscrews with milled beads. | 17th Jul 1926 | Box 65 \ 2 scan0097 | |
| Typed memo regarding an arrangement for an improved scheme to be submitted to keep a job moving. | 19th Jul 1926 | Box 65 \ 2 scan0098 | |
| Specification for production inspection, adjustment, and testing of the distribution board and cutout. | 19th Oct 1926 | Box 65 \ 2 scan0099 | |
| Test procedures for a dynamo cutout, detailing voltage, current, and resistance specifications. | 19th Oct 1926 | Box 65 \ 2 scan0100 | |
| Wiring diagram for a 40/50 distribution board and cutout test. | 22th Sep 1926 | Box 65 \ 2 scan0101 | |
| Standardisation document for securing a distribution box cover with thumb screws. | 22th Sep 1926 | Box 65 \ 2 scan0102 | |
| Comparison of windings for Derby & Springfield cutouts. | 5th Oct 1927 | Box 65 \ 2 scan0103 | |
| Instruction for an experimental electrical alteration to the distribution box on chassis 11-G3 and 14-EX. | 8th Oct 1927 | Box 65 \ 2 scan0104 | |
| Modified experimental connection for the shunt coil on the distribution box. | 8th Oct 1927 | Box 65 \ 2 scan0105 | |
| Page discussing a change of connection on a chassis and its effect on the field fuse safety margin. | 23th Jan 1928 | Box 65 \ 2 scan0106 | |
| Forwarding a self-explanatory note from Mr. Allen regarding chassis distribution board wires. | 23th Jan 1928 | Box 65 \ 2 scan0107 | |
| Examination of wires 6 and 8 on the chassis distribution board for potential failure due to cramped spacing and handling by coachbuilders. | 17th Jan 1928 | Box 65 \ 2 scan0108 | |
| The distribution board and cutout for a 15-EX Phantom chassis after 9000 miles. | 7th Mar 1928 | Box 65 \ 2 scan0109 | |
| Report from France regarding an electrical cutout failure on chassis 14.EX, with a handwritten follow-up asking for more details. | 12th Apr 1928 | Box 65 \ 2 scan0110 | |
| Covering memo for a set of notes regarding the burning of cutout and dynamo charging switch contacts. | 16th May 1928 | Box 65 \ 2 scan0111 | |
| Analysis of the burning of cutout and dynamo switch contacts based on different circuit configurations and switching sequences. | 16th May 1928 | Box 65 \ 2 scan0112 | |
| Continuation of a report analyzing different electrical cutout and charging switch configurations to minimize sparking. | 16th May 1928 | Box 65 \ 2 scan0113 | |
| Optimal wiring connection for a shunt coil in a distribution box based on experimental results. | 17th May 1928 | Box 65 \ 2 scan0114 | |
| Cover note for attached notes regarding the burning of cutout and dynamo charging switch contacts. | 17th May 1928 | Box 65 \ 2 scan0115 | |
| Electrical experimental record sheet for a Cut-Out Shunt connected to Terminal C. | 11th Jun 1928 | Box 65 \ 2 scan0116 | |
| Requesting a drawing of a distribution board, which is related to a battery charge indicator switch. | 29th Jun 1928 | Box 65 \ 2 scan0117 | |
| Revised and coloured Phantom wiring diagram for inclusion in the instruction book. | 29th Jun 1928 | Box 65 \ 2 scan0118 | |
| Correspondence regarding a blueprint for a battery charge indicator switch and layout issues on the instrument board. | 11th Jul 1928 | Box 65 \ 2 scan0119 | |
| Modifications to a Phantom wiring diagram, specifically the green light connection. | 16th Jul 1928 | Box 65 \ 2 scan0120 | |
| Corrections to a diagram for an accumulator switch and green light scheme, including fuse placement. | 20th Jul 1928 | Box 65 \ 2 scan0121 | |
| Modifications to a distribution board fitted with a green lamp switch. | 26th Jul 1928 | Box 65 \ 2 scan0122 | |
| Alterations to the Phantom Green Light Scheme wiring. | 1st Sep 1928 | Box 65 \ 2 scan0123 | |
| Proposing to delay a wiring change for the cutout connection until a new distribution board is ready. | 6th Sep 1928 | Box 65 \ 2 scan0124 | |
| Revised Phantom wiring diagram, requesting old prints be scrapped. | 15th Sep 1928 | Box 65 \ 2 scan0125 | |
| Minor alterations and a list of blueprints for the S.S. Chassis Distribution Board, Cutout, and Green Lamp Switch. | 15th Sep 1928 | Box 65 \ 2 scan0126 | |
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