| Description | Date | Identifier | |
| The mileage test of Ar. Eska Tungsten Points on chassis 3-GII. | 14th Aug 1924 | Box 35 \ 6 scan 130 | |
| Electrical experimental record sheet for Eska Tungsten Points. | 29th Oct 1923 | Box 35 \ 6 scan 131 | |
| The 10,000-mile performance of 'ESKA' tungsten points fitted to a 20 HP battery ignition system. | 20th Aug 1924 | Box 35 \ 6 scan 132 | |
| The performance and wear of Eska Tungsten distributor points after running for 11,587 miles on a 20 HP chassis. | 26th Jun 1924 | Box 35 \ 6 scan 133 | |
| Condition report on Eska Tungsten Points from chassis 3-GII. | 20th Aug 1924 | Box 35 \ 6 scan 134 | |
| The removal of tungsten points on vehicle 6-GII after 10,000 miles for examination. | 4th Nov 1924 | Box 35 \ 6 scan 135 | |
| Instructions regarding the properties and performance of tungsten contact points. | 7th May 1925 | Box 35 \ 6 scan 136 | |
| Instructions discussing the performance of contact points, comparing US and UK results, and suggesting a bench test for new larger tungsten points. | 29th Jun 1920 | Box 35 \ 6 scan 137 | |
| Inspection report on the condition of Tungsten distributor points after 13,560 miles of use. | 25th May 1925 | Box 35 \ 6 scan 138 | |
| The wear and condition of a screw point after 10,000 miles, comparing it to standard platinum points. | 29th Jun 1920 | Box 35 \ 6 scan 139 | |
| Mileage and wear report on an experimental bone grey fibre rubbing block and AS tungsten points from chassis 6-G-II. | 19th Jun 1925 | Box 35 \ 6 scan 140 | |
| Instruction sheet detailing the condition and advantages of tungsten points compared to platinum. | 29th Jun 1920 | Box 35 \ 6 scan 141 | |
| Log sheet detailing the history and remarks for Tungsten Contact Points. | 19th Jun 1925 | Box 35 \ 6 scan 142 | |
| Electrical experimental record sheet for Eska Tungsten Points AS. | 19th Jun 1925 | Box 35 \ 6 scan 143 | |
| The condition of Eska Tungsten ignition contact breaker points after completing 15,853 miles on a chassis. | 19th Jun 1925 | Box 35 \ 6 scan 144 | |
| Arguing for the use of tungsten points over platinum points due to their lower price and replaceability. | 3rd Jul 1925 | Box 35 \ 6 scan 145 | |
| Sourcing, testing, and performance characteristics of tungsten points. | 8th Jul 1925 | Box 35 \ 6 scan 146 | |
| Confirming a change in diameter for tungsten contact points and an order from Messrs. Melin. | 8th Jul 1925 | Box 35 \ 6 scan 147 | |
| Request to obtain 12 sets of Tungsten Contact Points from Johnson Matthey's for testing. | 9th Jul 1925 | Box 35 \ 6 scan 148 | |
| Procedure for testing new tungsten ignition contact points. | 25th Aug 1925 | Box 35 \ 6 scan 149 | |
| Request to have tungsten contact points fitted to battery ignition contact breaker levers. | 27th Aug 1925 | Box 35 \ 6 scan 150 | |
| Cover note regarding an attached letter from Johnson Matthey & Co. Ltd. about Tungsten Contact Points. | 11th Sep 1925 | Box 35 \ 6 scan 151 | |
| Letter from Johnson Matthey & Co. regarding the fitting of Tungsten Points to levers, noting one broke in the process. | 3rd Sep 1925 | Box 35 \ 6 scan 152 | |
| Fitting rubbing blocks to levers that have already been fitted with tungsten contact points. | 11th Sep 1925 | Box 35 \ 6 scan 153 | |
| The fitting of tungsten points to contact breaker levers for specific chassis. | 26th Sep 1925 | Box 35 \ 6 scan 154 | |
| Changes to tungsten point experiments on specific chassis. | 1st Oct 1925 | Box 35 \ 6 scan 155 | |
| The incorrect installation of both a finer primary coil and tungsten points on chassis 9-GIII. | 13th Oct 1925 | Box 35 \ 6 scan 156 | |
| Results of a 10,000-mile bench test on large diameter tungsten contact points. | 28th Oct 1925 | Box 35 \ 6 scan 157 | |
| The oxidation of lever and screw points, concluding their general condition after testing is good compared to standard platinum. | 20th Jun 1920 | Box 35 \ 6 scan 158 | |
| Requesting a progress update on making battery ignition tungsten contact points spherical. | 18th Nov 1925 | Box 35 \ 6 scan 159 | |
| Experimental record sheet for the testing of larger diameter tungsten points. | 14th Dec 1925 | Box 35 \ 6 scan 160 | |
| Requesting the doming of three used larger diameter tungsten contact points. | 14th Jan 1925 | Box 35 \ 6 scan 161 | |
| 10,000-mile bench test for large diameter tungsten contact points. | 14th Jan 1926 | Box 35 \ 6 scan 162 | |
| The results of mileage tests conducted on tungsten points for ignition systems. | 4th Feb 1926 | Box 35 \ 6 scan 163 | |
| Extract discussing tests on Remanol encased coils and tungsten contact points. | 4th Mar 1926 | Box 35 \ 6 scan 164 | |
| The battery ignition system of chassis 10-GIII after 2948 miles. | 12th Apr 1926 | Box 35 \ 6 scan 165 | |
| Fitting of tungsten contact points to ignition breaker levers and standardizing the process. | 13th Apr 1926 | Box 35 \ 6 scan 166 | |
| Supply of domed points and requesting the return of a sample screw from Messrs. Reynolds. | 13th Apr 1926 | Box 35 \ 6 scan 167 | |
| Chassis 10-GIII after 7526 miles, detailing issues with the battery ignition system and contact points. | 23th Apr 1926 | Box 35 \ 6 scan 168 | |
| Experimental record sheet for large diameter tungsten points. | 17th May 1926 | Box 35 \ 6 scan 169 | |
| Complaint regarding the excessive doming on tungsten contact points, resulting in their return to the supplier. | 3rd May 1926 | Box 35 \ 6 scan 170 | |
| The required doming of tungsten contact points on levers to accommodate for potential mis-alignment. | 1st May 1926 | Box 35 \ 6 scan 171 | |
| Request for a gauge to be made for tungsten contact points, referencing a previous design. | 18th May 1926 | Box 35 \ 6 scan 172 | |
| Requesting to book in 12 Tungsten Contact Screws received from W.H. Reynolds & Co.Ltd. | 27th May 1926 | Box 35 \ 6 scan 173 | |
| Comparative performance of British-sourced versus American-sourced tungsten points for ignition systems. | 5th Jun 1926 | Box 35 \ 6 scan 174 | |
| Continued letter discussing ignition contact breaker point failures and requesting spare parts and material information for further testing. | 5th Jun 1926 | Box 35 \ 6 scan 175 | |
| Performance comparison of platinum and tungsten interrupter points, coils, and condensers. | 11th Jun 1926 | Box 35 \ 6 scan 176 | |
| The performance and testing of ignition coils, condensers, and platinum points. | 11th Jun 1926 | Box 35 \ 6 scan 177 | |
| Offer from Johnson Matthey & Co. Limited to undertake the analysis of special contacts, such as American Tungsten. | 19th Jun 1926 | Box 35 \ 6 scan 178 | |
| Letter discussing the comparative performance of platinum versus tungsten for interrupter points, coils and condensers. | 30th Jun 1926 | Box 35 \ 6 scan 179 | |
| Technical discussion on ignition system components including coils, condensers, and contact breaker points. | 30th Jun 1926 | Box 35 \ 6 scan 180 | |
| Ignition system tests comparing U.S. tungsten points and Remy equipment with standard platinum points. | 30th Jun 1926 | Box 35 \ 6 scan 181 | |
| Instruction to fit tungsten contact points and ballast resistances to chassis 10-GIII. | 21th Jul 1926 | Box 35 \ 6 scan 182 | |
| Experiments and results on tungsten contact points. | 19th Aug 1926 | Box 35 \ 6 scan 183 | |
| The inspection and comparative analysis of different types of contact points. | 19th Aug 1926 | Box 35 \ 6 scan 184 | |
| Letter confirming receipt of a query about platinum versus tungsten interrupter points and advising that representative American units will be sent. | 19th Jul 1928 | Box 35 \ 6 scan 185 | |
| Covering memo from EFC to EP attaching other documents concerning Platinum Interrupter Points, Coils and Condensers. | 11th Aug 1926 | Box 35 \ 6 scan 186 | |
| From R. to EFC. with a list of questions regarding ongoing electrical experiments on ignition components. | 16th Aug 1926 | Box 35 \ 6 scan 187 | |
| Internal memorandum regarding Tungsten Points and referencing previous correspondence. | 19th Aug 1926 | Box 35 \ 6 scan 188 | |
| Confirming the dispatch of two copies of photomicrographs for Tungsten contacts. | 20th Aug 1926 | Box 35 \ 6 scan 189 | |
| Letter regarding ignition contact points, discussing a meeting and comparing results of platinum versus tungsten points. | 20th Aug 1926 | Box 35 \ 6 scan 190 | |
| Comparative tests of ignition system components including platinum and tungsten points. | 20th Aug 1926 | Box 35 \ 6 scan 191 | |
| Temperature-current tests comparing an American Bosch condenser with an in-house standard. | 20th Aug 1926 | Box 35 \ 6 scan 192 | |
| Letter from W.H. Reynolds & Co. discussing the examination of tungsten contacts, noting pitting, oxidation, wear, and purity. | 27th Aug 1926 | Box 35 \ 6 scan 193 | |
| Communications with suppliers about the results for Tungsten Contact Points. | 28th Aug 1926 | Box 35 \ 6 scan 194 | |
| Letter forwarding a Certificate of Assay for tungsten contact points from Johnson, Matthey & Co. Ltd. | 1st Sep 1926 | Box 35 \ 6 scan 195 | |
| Certificate of Assay for two samples of Tungsten Contact Points. | 31th Aug 1926 | Box 35 \ 6 scan 196 | |
| Analysis and comparison of Remy and RR-Reynolds tungsten contact points. | 1st Sep 1926 | Box 35 \ 6 scan 197 | |
| Letter confirming the shipment of two special clockwise distributor heads with a detailed parts list. | 7th Sep 1926 | Box 35 \ 6 scan 198 | |
| Parts list continuation page detailing washers, nuts, bolts, and studs with their corresponding quantities. | 7th Sep 1926 | Box 35 \ 6 scan 199 | |
| Scheme for systematically observing the life of ignition contact points using various component combinations. | 8th Sep 1926 | Box 35 \ 6 scan 200 | |
| Electrical experimental record sheet for large diameter tungsten contact points. | 6th Oct 1925 | Box 35 \ 6 scan 201 | |
| List of suggestions for improving the operation of platinum or tungsten contact points. | 3rd Sep 1926 | Box 35 \ 6 scan 202 | |
| Communications with W.H. Reynolds & Co. regarding the supply and modification of Tungsten Contacts for contact breakers. | 15th Sep 1926 | Box 35 \ 6 scan 203 | |
| Log sheet detailing the testing of large diameter tungsten points on a 40/50 chassis. | 14th Sep 1926 | Box 35 \ 6 scan 204 | |
| Modifications and testing of the battery ignition contact breaker unit. | 18th Sep 1926 | Box 35 \ 6 scan 205 | |
| Letter to a customer regarding the supply and testing of experimental ignition components. | 7th Oct 1926 | Box 35 \ 6 scan 206 | |
| Re-fitting of used battery ignition contact breaker components with new tungsten points. | 28th Oct 1926 | Box 35 \ 6 scan 207 | |
| 10,000-mile bench test on tungsten ignition contact points and a request for a follow-up test with platinum points. | 30th Oct 1926 | Box 35 \ 6 scan 208 | |
| Record of drawing numbers for Tungsten Points obtained from the Drawing Office. | 9th Nov 1926 | Box 35 \ 6 scan 209 | |
| Request for specific experimental electrical parts from chassis 5-EX, with instructions to scrap other non-standard parts. | 16th Dec 1926 | Box 35 \ 6 scan 210 | |
| Incorrect doming on battery ignition tungsten contact breaker levers, requesting they be ground flat. | 21th Dec 1925 | Box 35 \ 6 scan 211 | |
| Despatch of contact breaker levers fitted with tungsten and platinum points for inspection. | 24th Dec 1926 | Box 35 \ 6 scan 212 | |
| Short summary report on tests of platinum and tungsten battery ignition contact breaker points. | 24th Dec 1926 | Box 35 \ 6 scan 213 | |
| The comparative testing of platinum, U.S.A. tungsten, and English tungsten for battery ignition contact points. | 24th Dec 1926 | Box 35 \ 6 scan 214 | |
| The comparative testing of tungsten contact points from Delco-Remy and Messrs. Reynolds. | 24th Dec 1926 | Box 35 \ 6 scan 215 | |
| Bench tests comparing different contact point materials and ignition arrangements. | 24th Dec 1926 | Box 35 \ 6 scan 216 | |
| Comparative tests on ignition system components, including coils, condensers, and contact breaker points. | 24th Dec 1926 | Box 35 \ 6 scan 217 | |
| Spring testing for contact breakers, comparing the current design against a Delco-Remy model. | 24th Dec 1926 | Box 35 \ 6 scan 218 | |
| Comparison of Delco-Remy contact breakers and internal designs, with details of ongoing ignition system tests. | 24th Dec 1926 | Box 35 \ 6 scan 219 | |
| Ignition system tests, including findings on misfiring, the effect of oil on platinum points, and an analysis of the Delco-Remy ignition system. | 23th Dec 1926 | Box 35 \ 6 scan 220 | |
| Tests on platinum points. | 23th Dec 1926 | Box 35 \ 6 scan 221 | |
| Results of various tests conducted on tungsten points. | 18th Sep 1926 | Box 35 \ 6 scan 222 | |
| List of continued test results for various ignition system configurations and components. | 18th Sep 1926 | Box 35 \ 6 scan 223 | |
| The performance and wear characteristics of different ignition contact point samples. | 31th Dec 1926 | Box 35 \ 6 scan 224 | |
| Report classifying the performance of ignition contact points based on material, system, and presence of oil vapour. | 31th Dec 1926 | Box 35 \ 6 scan 225 | |
| Specifications and measurements for battery ignition tungsten contact points. | 5th Jan 1927 | Box 35 \ 6 scan 226 | |
| Requesting an alteration to drawing D51407 for the doming of battery ignition points. | 5th Jan 1927 | Box 35 \ 6 scan 227 | |
| Mechanical stiffness of RR versus Remy battery ignition contact points. | 1st Jan 1927 | Box 35 \ 6 scan 228 | |
| Dispatch of sample battery ignition contact points and a Delco-Remy distributor. | 10th Jan 1927 | Box 35 \ 6 scan 229 | |
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