| Description | Date | Identifier | |
| Letter from Lodge Plugs Limited enquiring about the results of further tests on their steatite plugs. | 20th Jun 1925 | Box 162 \ 6 img080 | |
| Carburettor and ignition plug issues on a New Phantom vehicle. | 30th Jun 1925 | Box 162 \ 6 img081 | |
| Requesting an order for four dozen closed-end Lodge sparking plugs for further testing. | 2nd Jul 1925 | Box 162 \ 6 img082 | |
| Analysis of the chemical composition of a nickel centre from a sparking plug. | 4th Jul 1925 | Box 162 \ 6 img083 | |
| Partial dispatch of Lodge Detachable Steatite Plugs. | 10th Jul 1925 | Box 162 \ 6 img084 | |
| Letter from Lodge Plugs Limited regarding an order and clarification of plug model numbers. | 9th Jul 1925 | Box 162 \ 6 img085 | |
| The despatch and comparison of Lodge and Bosch ignition plugs. | 14th Jul 1925 | Box 162 \ 6 img086 | |
| Requesting an order for two types of Lodge Sparking Plugs. | 20th Jul 1925 | Box 162 \ 6 img087 | |
| Clarifying the marking system for Lodge Sparking Plugs following a report from the Inspection Department. | 19th Aug 1925 | Box 162 \ 6 img088 | |
| Recommendation to purchase 500 Lodge C. 200 type detachable porcelain sparking plugs for reliability testing. | 1st Aug 1925 | Box 162 \ 6 img089 | |
| Adopting the new detachable C.200 type Lodge plugs for the New Phantom and Silver Ghost models. | 15th Oct 1925 | Box 162 \ 6 img090 | |
| Letter concerning the standardisation of detachable Lodge sparking plugs on Phantom cars. | 5th Nov 1925 | Box 162 \ 6 img091 | |
| Standardization of spark plugs for Phantom cars. | 1st Nov 1925 | Box 162 \ 6 img092 | |
| Standardisation report for Lodge detachable plugs. | 11th Nov 1925 | Box 162 \ 6 img093 | |
| Clarifying the marking and designation system for sparking plugs from Lodge Plugs Ltd. | 9th Dec 1925 | Box 162 \ 6 img094 | |
| The second page of a typed memo with a concluding instruction. | 9th Dec 1925 | Box 162 \ 6 img095 | |
| The receipt of Type C.3 Plugs from The Lodge Company for testing on the 20 HP Chassis. | 5th Jan 1926 | Box 162 \ 6 img096 | |
| Comparative tests of various sparking plugs to withstand over-oiling and sooting. | 1st Mar 1926 | Box 162 \ 6 img097 | |
| The ordering of improved Lodge C.150 sparking plugs for the Phantom chassis. | 30th Mar 1925 | Box 162 \ 6 img098 | |
| Testing and approval of modified Lodge sparking plugs for the Phantom model. | 29th Mar 1926 | Box 162 \ 6 img099 | |
| The supply of Lodge sparking plugs for the 'Phantom' chassis. | 9th Apr 1926 | Box 162 \ 6 img100 | |
| Letter from Lodge Plugs Ltd. regarding the testing and supply of Model C.150 plugs for the 'Phantom' Chassis. | 8th Apr 1926 | Box 162 \ 6 img101 | |
| The proposed improved C.150 'C' type detachable Lodge Sparking Plugs. | 12th Apr 1926 | Box 162 \ 6 img102 | |
| Supply and pricing of Lodge Plugs, which are offered at a 30% discount compared to K.L.G. | 30th Apr 1926 | Box 162 \ 6 img103 | |
| Letter from Lodge Plugs Limited proposing a test of their new Model A28 aero plugs. | 29th Apr 1926 | Box 162 \ 6 img104 | |
| The standardization of Lodge C.150 spark plugs for the Phantom chassis. | 13th Sep 1926 | Box 162 \ 6 img105 | |
| Letter from Lodge Plugs Ltd. regarding the standardization and marking of Model C150 spark plugs for the Phantom Chassis. | 10th Sep 1926 | Box 162 \ 6 img106 | |
| The standard designation of Lodge plugs for Phantom chassis. | 14th Sep 1926 | Box 162 \ 6 img107 | |
| Internal request to order Lodge and K.L.G. sparking plugs for experimental purposes related to the Falcon X engine. | 25th Oct 1926 | Box 162 \ 6 img108 | |
| The performance of a Lucas Magneto and issues with ignition plugs, throttle, and timing on car X.8793. | 11th May 1927 | Box 162 \ 6 img109 | |
| Performance of various sparking plugs for a supercharged engine. | 27th May 1927 | Box 162 \ 6 img110 | |
| Letter from Lodge Plugs Limited regarding the supply of sample spark plugs for testing. | 21th Mar 1930 | Box 162 \ 6 img111 | |
| Letter from Lodge Plugs Limited regarding sending one dozen MC3 plugs with non-corroding steel electrodes for testing. | 7th May 1930 | Box 162 \ 6 img112 | |
| Forgotten washer and sending new Lodge sparking plugs for testing. | 8th May 1930 | Box 162 \ 6 img113 | |
| Dispatch note confirming one dozen Lodge Plugs are being sent to G.W. Hancock in France. | 3rd May 1930 | Box 162 \ 6 img114 | |
| Querying a price request for Lodge Plugs for a Phantom II Chassis and confirming account procedures. | 23th Jun 1930 | Box 162 \ 6 img115 | |
| Standardisation document for chassis parts, specifically M.C.3-30 Lodge Plugs. | 5th Jun 1930 | Box 162 \ 6 img116 | |
| Letter from Lodge Plugs Limited to Rolls-Royce confirming an appointment for a meeting. | 6th Feb 1931 | Box 162 \ 6 img117 | |
| Letter from Lodge Plugs Limited concerning the adoption of the new Model MC3 spark plug for the Phantom II engine. | 29th Jun 1931 | Box 162 \ 6 img118 | |
| Directive regarding the decision to revert from waterproof Lodge C.3 plug terminals back to the old standard type. | 26th Oct 1931 | Box 162 \ 6 img119 | |
| Letter from Lodge Plugs regarding the development and performance of their new Model S1 steatite plug. | 9th Nov 1931 | Box 162 \ 6 img120 | |
| Advice note from Lodge Plugs Limited regarding the delivery of nine Model S1 plugs. | 9th Nov 1931 | Box 162 \ 6 img121 | |
| Letter to Lodge Plugs Ltd. concerning a film, a car viewing, and a discussion on plugs. | 9th Dec 1931 | Box 162 \ 6 img122 | |
| Letter from Lodge Plugs Limited to E.W. Hives arranging a meeting and a car run. | 11th Dec 1931 | Box 162 \ 6 img123 | |
| Order for 3 dozen Lodge plugs type S.1. | 14th Dec 1931 | Box 162 \ 6 img124 | |
| Letter to Lodge Plugs Ltd regarding the unsatisfactory performance of S.I type plugs in experimental high compression engines. | 16th Mar 1932 | Box 162 \ 6 img125 | |
| Letter to Lodge Plugs Ltd. regarding a new material for spark plug electrodes called Durimet L, to combat TEL fuel corrosion. | 24th Mar 1932 | Box 162 \ 6 img126 | |
| Letter to Lodge Plugs Ltd. requesting 14mm spark plugs for a 40/50 HP car engine due to pre-ignition issues with previous plugs. | 24th Mar 1932 | Box 162 \ 6 img127 | |
| Letter from Lodge Plugs Ltd. discussing the failure of returned spark plugs and recommending alternative models. | 7th Apr 1932 | Box 162 \ 6 img128 | |
| Page 2 of a letter from Lodge Plugs Ltd. regarding the performance of spark plugs. | 7th Apr 1932 | Box 162 \ 6 img129 | |
| Letter from Lodge Plugs Ltd. regarding the supply of new H14 sparking plugs for evaluation. | 9th Apr 1932 | Box 162 \ 6 img130 | |
| Invoice from Lodge Plugs Limited for H14 model spark plugs. | 9th Apr 1932 | Box 162 \ 6 img131 | |
| Thank you letter to Mr. Bernard Hopps of Lodge Plugs Ltd. regarding the receipt of 14mm plugs. | 12th Apr 1932 | Box 162 \ 6 img132 | |
| Letter to Lodge Plugs Ltd. providing feedback on the performance of their H.14 and A.15 spark plugs. | 18th Apr 1932 | Box 162 \ 6 img133 | |
| Sending three 14 mm Type H.14 plugs to Lodge Plugs Ltd. for inspection. | 18th Apr 1932 | Box 162 \ 6 img134 | |
| The performance of four different types of 14 m/m sparking plugs on a C.XLII Unit. | 18th Apr 1932 | Box 162 \ 6 img135 | |
| Letter from Lodge Plugs Ltd. discussing the performance and cost of various spark plug models for Rolls-Royce. | 19th Apr 1932 | Box 162 \ 6 img136 | |
| Letter to Lodge Plugs Ltd. discussing the performance and modification of various car spark plugs. | 20th Apr 1932 | Box 162 \ 6 img137 | |
| Letter from Lodge Plugs Limited regarding the suitability of their C3 plugs for high compression engines. | 22th Apr 1932 | Box 162 \ 6 img138 | |
| Letter to Lodge Plugs Ltd. regarding performance issues with C.3 and 14mm car plugs. | 22th Apr 1932 | Box 162 \ 6 img139 | |
| Letter from Lodge Plugs Limited discussing the development and testing of various spark plug models. | 23th Apr 1932 | Box 162 \ 6 img140 | |
| Letter from Lodge Plugs Ltd. suggesting severe road condition testing for H14 plugs. | 23th Apr 1932 | Box 162 \ 6 img141 | |
| Letter to Lodge Plugs Ltd. discussing performance issues with C.3 and S.1 spark plugs. | 25th Apr 1932 | Box 162 \ 6 img142 | |
| Performance and selection of spark plugs for various car models. | 25th Apr 1932 | Box 162 \ 6 img143 | |
| Letter from Lodge Plugs discussing spark plug dimensions for a 25 HP engine and misfiring issues on a P2 car. | 28th Apr 1932 | Box 162 \ 6 img144 | |
| Letter to Lodge Plugs Ltd. concerning special 14 m/m plugs for the 25 HP car and misfiring issues with C.3 plugs. | 29th Apr 1932 | Box 162 \ 6 img145 | |
| Letter from Lodge Plugs regarding misfiring issues with magneto ignition on Phantom II car cylinder heads, suggesting tests with CH3 and S1 plugs. | 2nd May 1932 | Box 162 \ 6 img146 | |
| Letter to Lodge Plugs Ltd. discussing the testing and performance of various spark plugs. | 3rd May 1932 | Box 162 \ 6 img147 | |
| Letter from Lodge Plugs Limited regarding experimental 14 m/m plugs for a 25 HP car engine. | 6th May 1932 | Box 162 \ 6 img148 | |
| Advice note from Lodge Plugs Limited regarding the dispatch of Lodge Model X298 Sparking Plugs. | 6th May 1932 | Box 162 \ 6 img149 | |
| Thank you letter to Lodge Plugs Ltd. for sending 14 mm. plugs for the 25 HP. engine. | 7th May 1932 | Box 162 \ 6 img150 | |
| Sparking plug tests comparing different models from Lodge and K.L.G. | 21th May 1932 | Box 162 \ 6 img151 | |
| Ignition issues, pointing to magneto inefficiency and carburation deficiency. | 28th May 1932 | Box 162 \ 6 img152 | |
| Sparking plug tests concluding that a misfiring issue was due to the magnetos. | 28th May 1932 | Box 162 \ 6 img153 | |
| Sparking plug and magneto tests on chassis 214.AMS. | 27th May 1932 | Box 162 \ 6 img154 | |
| Sparking plug tests following magneto adjustments to cure misfiring. | 30th May 1932 | Box 162 \ 6 img155 | |
| Experiments conducted on a 25HP ignition system, investigating issues with wiring, spark plugs and low speed performance. | 30th May 1932 | Box 162 \ 6 img156 | |
| Test report on Lodge C.3 and C.H.3 spark plugs for the Phantom II engine. | 1st Jun 1932 | Box 162 \ 6 img157 | |
| Letter to Lodge Plugs Ltd. regarding the testing of CH.3 and C.3 spark plugs. | 2nd Jun 1932 | Box 162 \ 6 img158 | |
| Letter from Lodge Plugs Limited regarding the supply of experimental 18 m/m thread plugs for a Phantom II engine. | 3rd Jun 1932 | Box 162 \ 6 img159 | |
| Advice note from Lodge Plugs Limited regarding the dispatch of a dozen Model HD3 sparking plugs. | 3rd Jun 1932 | Box 162 \ 6 img160 | |
| Letter from Lodge Plugs Limited regarding sending two dozen Model HD14/3 spark plugs for experimental purposes. | 3rd Jun 1932 | Box 162 \ 6 img161 | |
| Advice note from Lodge Plugs Limited regarding the dispatch of 2 dozen sparking plugs. | 3rd Jun 1932 | Box 162 \ 6 img162 | |
| Return of six scrap S.1 sparking plugs to the Lodge Plug Co. for examination. | 4th Jun 1932 | Box 162 \ 6 img163 | |
| Letter to Lodge Plugs Ltd. regarding the performance and return of faulty 40/50 plugs from a Phantom II car. | 4th Jun 1932 | Box 162 \ 6 img164 | |
| Letter from Lodge Plugs Limited concerning the testing of various spark plugs on a Phantom II car. | 8th Jun 1932 | Box 162 \ 6 img165 | |
| Letter from Lodge Plugs Ltd. regarding the supply of Model HD3 spark plugs for testing in Phantom II and 25 HP cars. | 28th Jun 1932 | Box 162 \ 6 img166 | |
| Letter to Lodge Plugs Ltd. regarding the performance test of their HD3 plugs over 7,000 miles. | 21th Jul 1932 | Box 162 \ 6 img167 | |
| Correspondence from Lodge Plugs regarding the successful 7,000-mile test of HD3 plugs on a 50-HP chassis and inquiring about tests on the 25-HP model. | 27th Jul 1932 | Box 162 \ 6 img168 | |
| Internal request to order two dozen modified spark plugs for the Peregrine engine from two different suppliers. | 8th Aug 1932 | Box 162 \ 6 img169 | |
| Letter to The Lodge Plug Co. regarding the testing, dimensions, and ordering of various spark plugs. | 18th Aug 1932 | Box 162 \ 6 img170 | |
| Page 2 of a letter to Lodge Plugs Ltd. regarding a 10,000-mile test on H.D.3 plugs. | 18th Aug 1932 | Box 162 \ 6 img171 | |
| The despatch of K.L.G. and Lodge type plugs for examination. | 18th Aug 1932 | Box 162 \ 6 img172 | |
| Letter discussing adjustments and requirements for different types of spark plugs. | 22th Aug 1932 | Box 162 \ 6 img173 | |
| Letter providing feedback on plug performance, brake linings, and standardization across various car models. | 24th Aug 1932 | Box 162 \ 6 img174 | |
| Letter discussing the dimensions and suitability of A.15, HD.3, and K.L.G. spark plugs for Phantom and 20/25 models. | 24th Aug 1932 | Box 162 \ 6 img175 | |
| Chasing a reply from Lodge Plugs Limited regarding an urgent order for sparking plugs for the Phantom II Chassis. | 3rd Sep 1932 | Box 162 \ 6 img176 | |
| Confirming a previous memo regarding sparking plugs for the Phantom II Chassis. | 13th Sep 1932 | Box 162 \ 6 img177 | |
| Letter to Lodge Plugs Ltd regarding unsatisfactory A.15, 14 mm, sparking plugs after repeated failures. | 15th Sep 1932 | Box 162 \ 6 img178 | |
| Voltage measurement test results for four different types of Peregrine sparking plugs. | 15th Sep 1932 | Box 162 \ 6 img179 | |
| | | | |
