| Description | Date | Identifier | |
| Page 3 of a dynamo testing procedure, detailing the final bedding of brushes and various load and speed tests. | 10th Apr 1929 | Box 70 \ 4 scan0107 | |
| Inspection and testing procedures for dynamo components and insulation. | 13th Feb 1925 | Box 70 \ 4 scan0108 | |
| Outlining the completion of specifications for electrical production tests on the V series chassis. | 13th Feb 1925 | Box 70 \ 4 scan0109 | |
| Amendment to the production test specification for the ignition distributor and contact breaker on 20 HP & 40/50 HP models. | 16th Mar 1926 | Box 70 \ 4 scan0110 | |
| Production inspection, adjustment, and test procedures for the ignition distributor and contact breaker. | 15th Oct 1926 | Box 70 \ 4 scan0111 | |
| Procedure for testing and setting a contact breaker and distributor. | 15th Oct 1926 | Box 70 \ 4 scan0112 | |
| Testing procedures for a distributor high tension rotor, including insulation and clearance checks. | 15th Oct 1926 | Box 70 \ 4 scan0113 | |
| Procedure for the mechanical testing of a 20 HP governor, including performance limits. | 15th Oct 1926 | Box 70 \ 4 scan0114 | |
| Instructions on altering the set of a spring for weights if speed limits are not met. | 7th Jul 1927 | Box 70 \ 4 scan0115 | |
| Specification for the production inspection, adjustment and test of the ignition distributor and contact breaker. | 7th Jul 1927 | Box 70 \ 4 scan0116 | |
| Production inspection, adjustment, and test procedures for the ignition distributor and contact breaker. | 7th Jul 1927 | Box 70 \ 4 scan0117 | |
| Instructions for testing and adjusting a contact breaker and distributor, detailing current, speed, and tension specifications. | 7th Jul 1927 | Box 70 \ 4 scan0118 | |
| Page of a test procedure document for a distributor high tension rotor, covering insulation and clearance checks. | 2nd Feb 1928 | Box 70 \ 4 scan0119 | |
| Revised specification for the inspection and testing of the Ignition Distributor and Contact Breaker. | 2nd Feb 1928 | Box 70 \ 4 scan0120 | |
| Production inspection, adjustment, and test procedure for an ignition distributor and contact breaker. | 9th Feb 1928 | Box 70 \ 4 scan0121 | |
| Testing procedure for an ignition distributor's contact breaker and spring tension. | 9th Feb 1928 | Box 70 \ 4 scan0122 | |
| Continued page of test procedures for a distributor rotor, covering tension, insulation, and clearance specifications. | 27th Jan 1925 | Box 70 \ 4 scan0123 | |
| Distributing the specification for production inspection and testing of the Watford type EO6 magneto for the EAC chassis. | 27th Jan 1925 | Box 70 \ 4 scan0124 | |
| Specification for production inspection and test of a Watford Type EC6 (d) Magneto. | 22th Jan 1925 | Box 70 \ 4 scan0125 | |
| Page of test procedures for ignition system components including circuits, contact breakers, and magnetos. | 22th Jan 1925 | Box 70 \ 4 scan0126 | |
| Specifications for minimum magneto sparking speeds and gear meshing. | 1st Feb 1925 | Box 70 \ 4 scan0127 | |
| Numerical items from the Production Test Specification for the Watford E06 (d) magneto for EAC chassis. | 1st Feb 1925 | Box 70 \ 4 scan0128 | |
| Production specification for the inspection and testing of Watford EO6 (d) magnetos for EAC. | 6th Feb 1925 | Box 70 \ 4 scan0129 | |
| Update to the inspection and test specification for a Watford Type E06(d) Magneto for an EAC Chassis. | 11th Jun 1925 | Box 70 \ 4 scan0130 | |
| Production inspection and test specification for a Watford Type EG6 (d) Magneto for an R.R. Eagle Chassis. | 11th Jun 1925 | Box 70 \ 4 scan0131 | |
| Enclosing the production inspection and test specification for the Watford EO6 magneto. | 18th Jun 1926 | Box 70 \ 4 scan0132 | |
| The tentative specification and initial testing of the new Watford Type EW6 magneto for the Phantom chassis, noting issues with noisiness and the contact breaker lever. | 3rd Feb 1928 | Box 70 \ 4 scan0133 | |
| Specification of Production Inspection & Test for a Watford Type EW6 Magneto for the 40/50 HP Chassis. | 4th Jan 1928 | Box 70 \ 4 scan0134 | |
| Page detailing testing procedures for electrical ignition components, including continuity, force, and high-speed running tests. | 4th Jan 1928 | Box 70 \ 4 scan0135 | |
| Magneto testing procedure detailing checks for gear meshing and minimum sparking speeds at various positions. | 3rd Feb 1928 | Box 70 \ 4 scan0136 | |
| Production inspection and test log for Watford Type EW6 Magnetos. | 3rd Feb 1928 | Box 70 \ 4 scan0137 | |
| Specification for production inspection, adjustment, and testing of a combined main switch and relay switch unit. | 5th Mar 1928 | Box 70 \ 4 scan0138 | |
| Testing procedures for a main switch, detailing electrical and mechanical test requirements. | 5th Mar 1928 | Box 70 \ 4 scan0139 | |
| Specifications and testing procedures for a relay switch, including a table of gap limits. | 5th Mar 1925 | Box 70 \ 4 scan0140 | |
| Continuation of testing procedures for a relay switch unit, including spring tension and voltage breakdown tests. | 5th Mar 1925 | Box 70 \ 4 scan0141 | |
| Specification table for a push button switch, detailing gap measurements and button depression at various positions. | 13th Feb 1925 | Box 70 \ 4 scan0142 | |
| Specification for the production testing of a starter motor and reduction gear. | 30th Jan 1925 | Box 70 \ 4 scan0143 | |
| Diagnostic procedure for testing an electric motor's magnetic circuit and mechanical friction. | 30th Jan 1925 | Box 70 \ 4 scan0144 | |
| Procedure for conducting light and load tests on a motor, including specifications for torque, current, and speed. | 30th Jan 1925 | Box 70 \ 4 scan0145 | |
| Continued page detailing motor testing procedures, including light and load tests, and the relationship between voltage, current, and speed. | 30th Jan 1925 | Box 70 \ 4 scan0146 | |
| Continued page of test procedures for electric motors, focusing on load tests, magnetic circuits, and fault diagnosis. | 30th Jan 1925 | Box 70 \ 4 scan0147 | |
| Continuation of test procedures for a motor, including intermittent load, insulation breakdown, and resistance tests. | 9th Mar 1926 | Box 70 \ 4 scan0148 | |
| Specification document for the production, inspection, adjustment, and testing of a combined main and auxiliary relay switch unit. | 9th Mar 1926 | Box 70 \ 4 scan0149 | |
| Inspection and testing procedure for a main switch unit, detailing contact gap measurements and coil current checks. | 1st Mar 1926 | Box 70 \ 4 scan0150 | |
| Continuation of testing procedures for a main switch, detailing electrical and mechanical verifications. | 9th Mar 1926 | Box 70 \ 4 scan0151 | |
| Specification table for various gap measurements of a relay switch. | 9th Mar 1926 | Box 70 \ 4 scan0152 | |
| Test procedures for a relay switch unit, outlining current, voltage, and spring load specifications. | 4th Sep 1929 | Box 70 \ 4 scan0153 | |
| Production test table for S.S. Sliding Armature Starter Motors. | 4th Sep 1929 | Box 70 \ 4 scan0154 | |
| Tabular data sheet logging motor test results for brake torque, current, and speed. | 4th Sep 1929 | Box 70 \ 4 scan0155 | |
| Production test table for S.S. Sliding Armature Starter Motors. | 16th Jul 1929 | Box 70 \ 4 scan0156 | |
| Performance test log sheet for various motor designs, recording brake torque, current, speed, and remarks. | 6th Jul 1929 | Box 70 \ 4 scan0157 | |
| Production test table for S.S. Sliding Armature Starter Motors. | 4th Sep 1929 | Box 70 \ 4 scan0158 | |
| Test log sheet recording performance data for various motors, including torque, current, speed, and noise levels. | 11th Jul 1929 | Box 70 \ 4 scan0159 | |
| Production test table for an S.S. sliding armature starter motor. | 11th Jul 1929 | Box 70 \ 4 scan0160 | |
| Test log sheet recording motor performance metrics like brake torque, current, and speed. | 4th Sep 1929 | Box 70 \ 4 scan0161 | |
| Production test table for S.S. Sliding Armature Starter Motors. | 4th Sep 1929 | Box 70 \ 4 scan0162 | |
| Test log sheet detailing performance metrics for various motor designs, including brake torque, current, and speed. | 4th Sep 1929 | Box 70 \ 4 scan0163 | |
| Production test table results for S.S. Sliding Armature Starter Motors. | 20th Jul 1929 | Box 70 \ 4 scan0164 | |
| Test log sheet recording performance data for various motors, including torque, current, and speed. | 16th Jul 1929 | Box 70 \ 4 scan0165 | |
| Production test table for S.S. Sliding Armature Starter Motors, listing test results for various motor designs. | 16th Jul 1929 | Box 70 \ 4 scan0166 | |
| Test log sheet recording motor performance metrics including brake torque, current, and speed. | 30th Jul 1929 | Box 70 \ 4 scan0167 | |
| Production test table for S.S. sliding armature starter motors. | 16th Jul 1929 | Box 70 \ 4 scan0168 | |
| Log sheet detailing test results for various motor designs, including torque, current, and speed measurements. | 13th Aug 1929 | Box 70 \ 4 scan0169 | |
| Production test table for a S.S. Sliding Armature Starter Motor. | 16th Jul 1929 | Box 70 \ 4 scan0170 | |
| Test log sheet recording performance data for various motor designs. | 8th Aug 1929 | Box 70 \ 4 scan0171 | |
| Production test table for S.S. Sliding Armature Starter Motors. | 16th Jul 1929 | Box 70 \ 4 scan0172 | |
| Test log sheet recording performance data for various motor designs, including torque, current, and speed. | 16th Aug 1929 | Box 70 \ 4 scan0173 | |
| Specification for the production test of the R.R. EAC switchbox for 'V' series chassis. | 30th Jan 1925 | Box 70 \ 4 scan0174 | |
| Specification for the production inspection and testing of a switchbox. | 22th Jan 1925 | Box 70 \ 4 scan0175 | |
| Continuation page of instructions for testing various electrical terminal combinations and light functions. | 19th Oct 1926 | Box 70 \ 4 scan0176 | |
| Specification document for the production inspection and testing of a switchbox for a 40/50 chassis. | 19th Oct 1926 | Box 70 \ 4 scan0177 | |
| Continuation of a procedure for testing electrical circuits and terminals. | 8th May 1925 | Box 70 \ 4 scan0178 | |
| The Watford magneto with a thicker cover plate. | 8th May 1925 | Box 70 \ 4 scan0179 | |
| Remarks on Watford Magnetos for EAC and the testing of an EO.6 magneto left by Mr. North. | 9th Dec 1925 | Box 70 \ 4 scan0180 | |
| Instructions and test results for a Watford E06 magneto, No. 87407. | 11th Dec 1925 | Box 70 \ 4 scan0181 | |
| Instruction note regarding a noise nuisance in tested Watford machines and proposed modifications. | 29th Jun 1920 | Box 70 \ 4 scan0182 | |
| Performance issues with a modified Watford magneto and requesting its replacement. | 17th Dec 1925 | Box 70 \ 4 scan0183 | |
| Letter from North & Sons Limited discussing technical details of magnetos, slip rings, and pick-ups. | 18th Dec 1925 | Box 70 \ 4 scan0184 | |
| Letter from North & Sons Ltd. regarding the decision to revert to ebonite for magneto moulds. | 18th Dec 1926 | Box 70 \ 4 scan0185 | |
| The fitting of a Watford magneto to vehicle 44-PK, replacing a B.T.H. magneto. | 30th Dec 1925 | Box 70 \ 4 scan0186 | |
| Experimental testing of a modified Watford magneto with a thicker cover to reduce noise for the New Phantom. | 29th Jan 1926 | Box 70 \ 4 scan0187 | |
| Proposal from North & Sons Ltd. regarding Watford magnetos for the New Phantom. | 10th Feb 1926 | Box 70 \ 4 scan0188 | |
| Requesting two Watford magnetos with aluminium armature cover plates for use on experimental cars. | 11th Feb 1926 | Box 70 \ 4 scan0189 | |
| Electrical experimental record sheet for a Watford E06d magneto, number 87407. | 8th Dec 1925 | Box 70 \ 4 scan0190 | |
| Production inspection and test results for the Watford Type EC6 (d) Magneto. | 21th Jan 1925 | Box 70 \ 4 scan0191 | |
| Instructions for modifying a Watford E06 magneto with a thicker aluminium armature cover plate to reduce noise. | 19th Jul 1926 | Box 70 \ 4 scan0192 | |
| Test report on a modification to reduce noise in magnetos, including mileage data. | 23th Jul 1926 | Box 70 \ 4 scan0193 | |
| Instruction sheet for the conversion of a Watford magneto and its subsequent fitting to chassis 9EX. | 23th Jul 1926 | Box 70 \ 4 scan0194 | |
| Request to order a new Cast Aluminium Dust Cover and modified brush for a Watford Magneto for testing purposes. | 11th Oct 1926 | Box 70 \ 4 scan0195 | |
| Confirmation memo regarding two Watford EO6 magnetos modified with thicker aluminium armature cover plates. | 9th Nov 1926 | Box 70 \ 4 scan0196 | |
| The modification and receipt of an EO.6 Type Watford Magneto. | 9th Nov 1926 | Box 70 \ 4 scan0197 | |
| Experimental parts received for a Watford EO6 magneto for noise reduction trials. | 26th Nov 1926 | Box 70 \ 4 scan0198 | |
| Watford magneto with a thicker armature cover plate. | 29th Nov 1926 | Box 70 \ 4 scan0199 | |
| Electrical experimental record sheet for a Watford E06 Magneto, tracking its testing and mileage. | 29th Mar 1926 | Box 70 \ 4 scan0200 | |
| Requesting the return of a Watford Magneto with a report. | 1st Dec 1926 | Box 70 \ 4 scan0201 | |
| Test report on a Watford Magneto with a thicker armature cover plate, which was found to offer no improvement and had excessive vibration. | 1st Dec 1926 | Box 70 \ 4 scan0202 | |
| Testing and dispatch of a thicker armature cover plate for Watford magnetos. | 2nd Dec 1926 | Box 70 \ 4 scan0203 | |
| The thicker armature cover plate for Watford magnetos and the delivery of modified units. | 6th Dec 1926 | Box 70 \ 4 scan0204 | |
| The interchangeability and trial status of thicker armature cover plates for Watford magnetos. | 7th Dec 1926 | Box 70 \ 4 scan0205 | |
| Reporting that a thicker armature cover plate for Watford magnetos offers no quietness advantage. | 7th Dec 1926 | Box 70 \ 4 scan0206 | |
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