| Description | Date | Identifier | |
| Inquiry regarding the dynamo capacity of the 20/25 HP engine in light tanks for powering a wireless set. | 23th Jun 1933 | Box 163 \ 2 img058 | |
| Cover note referencing three attached letters regarding 20/25 HP tank engines on the topics of lubrication, wireless screening, and dynamo capacity. | 26th Jun 1933 | Box 163 \ 2 img060 | |
| Letter regarding an oil leak from a 20/25 HP engine's lubricating system in a Light Tank. | 23th Jun 1933 | Box 163 \ 2 img061 | |
| Letter regarding the screening arrangements for 20/25 HP engines, advising that no modifications are currently required. | 23th Jun 1933 | Box 163 \ 2 img062 | |
| Internal memorandum regarding experiments and modifications for Tank Engines under contract T.555. | 1st Aug 1933 | Box 163 \ 2 img063 | |
| Instructions for the production, testing, and despatch of two sets of ignition wires for tank engines. | 1st Aug 1933 | Box 163 \ 2 img064 | |
| Test results for ignition wires for tank engines, comparing voltage performance with and without a screen. | 2nd Aug 1938 | Box 163 \ 2 img065 | |
| Test results for two sets of screened ignition cables fitted with different Lodge screening caps for tank engines. | 3rd Aug 1933 | Box 163 \ 2 img066 | |
| Requesting information about a dynamo for wireless equipment on 20/25 HP engine light tanks. | 30th Aug 1933 | Box 163 \ 2 img067 | |
| Letter to the Chief Inspector of Armaments concerning the dynamo and battery specifications for Light Tanks Mark 2A and 2B. | 1st Jul 1933 | Box 163 \ 2 img068 | |
| Drawing of contacts for wireless screens, type M.S.V, sample 'B'. | 15th Sep 1933 | Box 163 \ 2 img069 | |
| Detrimental effects, such as ignition plug over-oiling, experienced in cars after fitting wireless systems. | 21th Sep 1933 | Box 163 \ 2 img070 | |
| Testing spark suppressors for car wireless sets and improving ignition coil performance. | 22th Sep 1933 | Box 163 \ 2 img071 | |
| Ignition coil performance for cars fitted with wireless and higher compressions. | 26th Sep 1933 | Box 163 \ 2 img072 | |
| Request to arrange a meeting with Philco Wireless to discuss spark suppressors for ignition equipment. | 27th Sep 1933 | Box 163 \ 2 img073 | |
| The feasibility of modifying a dynamo for a tank engine to produce 20 amperes. | 30th Sep 1933 | Box 163 \ 2 img074 | |
| Urgent confirmation to order parts for a 20/25 tank dynamo, including plates, wire, and commutator components. | 27th Oct 1933 | Box 163 \ 2 img075 | |
| Request to arrange for another armature to be wound for a dynamo for War Office tank engines. | 27th Oct 1933 | Box 163 \ 2 img076 | |
| Parts list for a higher output Dynamo on a 20/25 HP Tank Engine. | 3rd Nov 1933 | Box 163 \ 2 img077 | |
| Difficulties in obtaining the desired output from a 20/25 HP tank dynamo. | 16th Nov 1933 | Box 163 \ 2 img078 | |
| Instructions for rewinding a Bensport dynamo armature for a 20/25 HP tank engine. | 18th Nov 1933 | Box 163 \ 2 img079 | |
| Experiments to develop a 20/25 tank engine dynamo capable of delivering 20 amperes. | 11th Dec 1933 | Box 163 \ 2 img080 | |
| Report proposing a contract to produce a dynamo designed for the 20/25 HP engine for the War Office Armament Dept. | 11th Dec 1933 | Box 163 \ 2 img081 | |
| Relaying a reply from the War Office regarding trials for a 20/25 HP Engine Dynamo. | 22th Dec 1933 | Box 163 \ 2 img082 | |
| Solenoid issue and urgent delivery requirement for a Tank Engine. | 21th Jun 1934 | Box 163 \ 2 img083 | |
| Telegram regarding contact breaker bases required for a Roycar. | 21th Jun 1934 | Box 163 \ 3 img001 | |
| Telex message to Rotax Ltd. requesting a strip report on two magnetos. | 7th Jul 1934 | Box 163 \ 3 img002 | |
| Urgent telex request for hotter Type 773B plugs required for a special test on the P.V.12. | 25th Jul 1934 | Box 163 \ 3 img003 | |
| Telex message to Delco-Remy & Hyatt regarding an urgent delivery of distributor caps. | 25th Jul 1934 | Box 163 \ 3 img004 | |
| Telex message to Delco-Remy & Hyatt requesting an update on an urgent delivery of a distributor and caps. | 25th Jul 1934 | Box 163 \ 3 img005 | |
| Telegram to B.T.H. Co. regarding the delivery time for magnetos. | 30th Jul 1934 | Box 163 \ 3 img006 | |
| Message to Joseph Lucas in Birmingham requesting a delay in arrival time until noon. | 30th Oct 1934 | Box 163 \ 3 img007 | |
| Short memo regarding an appointment or delivery for Major Cox at Conduit Street. | 26th Feb 1935 | Box 163 \ 3 img008 | |
| Telegram to K.L.G. Sparking Plugs, Ltd. requesting 868 plugs. | 7th Mar 1935 | Box 163 \ 3 img009 | |
| Telegram to B.T.H. Co. Ltd. requesting definite news on a promised second aero motor. | 30th May 1935 | Box 163 \ 3 img010 | |
| Short typed memo regarding a failed test in Coventry. | 6th Jun 1935 | Box 163 \ 3 img011 | |
| Exceptionally urgent supply request for item 868B. | 17th Jun 1935 | Box 163 \ 3 img012 | |
| Telegram to B.T.H. Co. Ltd. in Coventry, chasing the delivery of a starter motor. | 16th Jul 1935 | Box 163 \ 3 img013 | |
| To Messrs. Rotax concerning points discussed over the phone regarding a starter for a Roycar. | 4th Oct 1935 | Box 163 \ 3 img014 | |
| Typed message to Messrs. Rotax, Ltd. regarding the urgent status of a motor and cutter. | 14th Oct 1935 | Box 163 \ 3 img015 | |
| Telegraphic style communication regarding magnetos. | 14th Jun 1935 | Box 163 \ 3 img016 | |
| Booster coil, awaiting news from B.T.H. Co. Ltd. and Gough Asteroidal Coventry. | 25th Oct 1935 | Box 163 \ 3 img017 | |
| Telegraphic message to B.T.H. Co. Ltd. confirming satisfactory receipt of magnetos. | 26th Oct 1935 | Box 163 \ 3 img018 | |
| Telegram to Rotax Ltd. requesting the despatch of a modified starter. | 18th Oct 1935 | Box 163 \ 3 img019 | |
| Short memo confirming the status of a promised but unreceived pair of parts from B.T.H. Co. Ltd. | 1st Nov 1935 | Box 163 \ 3 img020 | |
| Brief typed message to Messrs. Rotax, Ltd., Aviation Dept., regarding carrying on with 'two N3CJ' and arranging a discussion. | 15th Nov 1935 | Box 163 \ 3 img021 | |
| Short typed message to Messrs. Delco Remy & Hyatt, Ltd. regarding a meeting. | 14th Dec 1935 | Box 163 \ 3 img022 | |
| Telegram to Delco Remy & Hyatt Ltd. regarding a meeting. | 1st Jan 1936 | Box 163 \ 3 img023 | |
| Telegram requesting eight CM5H aero motor brushes to be posted. | 28th Jan 1936 | Box 163 \ 3 img024 | |
| Notification to British Thomson Houston Co.Ltd. that CISE12S magnetos have not yet arrived. | 18th Feb 1936 | Box 163 \ 3 img025 | |
| Telegram requesting a man to be sent to fit modified brush holders on four vehicles. | 22th Feb 1936 | Box 163 \ 3 img026 | |
| Telegram to Delco-Remy & Hyatt Ltd. cancelling an appointment due to indisposition. | 9th Mar 1936 | Box 163 \ 3 img027 | |
| Sent to the Air Ministry cancelling a meeting. | 9th Mar 1936 | Box 163 \ 3 img028 | |
| Telegram to Lodge of Rugby requesting a visit to discuss failures of their plugs. | 3rd Apr 1936 | Box 163 \ 3 img029 | |
| Telegram inquiring about the status of an order for racing lamps from Lucas Birmingham. | 3rd Apr 1936 | Box 163 \ 3 img030 | |
| Specifications for a 24 Volt motor from Asteroidal Coventry. | 9th Apr 1936 | Box 163 \ 3 img031 | |
| Telegraphic query about the despatch date for new and reconditioned 'Q' magnetos. | 18th Mar 1936 | Box 163 \ 3 img032 | |
| Brief note confirming attendance at a meeting at the Air Ministry in London. | 22th Apr 1936 | Box 163 \ 3 img033 | |
| Urgent telegram requesting the dispatch of Halls Bentley Lamps to Paris. | 16th May 1936 | Box 163 \ 3 img034 | |
| Telegram confirming the dispatch of one pair of new standard magnetos for collection in Derby. | 26th Jun 1926 | Box 163 \ 3 img035 | |
| Telegram received by telephone regarding a gauge leaving on a passenger service. | 25th May 1926 | Box 163 \ 3 img036 | |
| Request to Messrs. S. Smith & Sons, Ltd. for the delivery time of Hall's petrol gauge. | 25th May 1936 | Box 163 \ 3 img037 | |
| Short telex communication to Messrs. K.L.G. London requesting a further despatch of 24 items for a test. | 26th May 1936 | Box 163 \ 3 img038 | |
| Telegram received by telephone confirming a Friday arrival at the works. | 27th May 1936 | Box 163 \ 3 img039 | |
| Telegram from B.T.H. Co. Ltd. to Roycar inquiring about the delivery of AVA compressors. | 16th Jun 1936 | Box 163 \ 3 img040 | |
| Telegram to K.L.G. Co. Ltd. requesting advice on the despatch of extensions with cowls. | 17th Jun 1936 | Box 163 \ 3 img041 | |
| Telegram regarding modified safety gaps on Merlin C.II coils, awaiting a response before flying a Fairey Battle. | 9th Jul 1936 | Box 163 \ 3 img042 | |
| Telegram confirming the despatch of a distributor to be collected at Derby station. | 22th May 1920 | Box 163 \ 3 img043 | |
| Telegram from the ship Queen Mary seeking information on spark plugs. | 10th Jul 1936 | Box 163 \ 3 img044 | |
| Telegram to Champlug London asking if their officials are arriving tomorrow. | 6th Aug 1936 | Box 163 \ 3 img045 | |
| Telegram regarding the expected delivery of a starter motor. | 10th Aug 1936 | Box 163 \ 3 img046 | |
| Short typed memo arranging a meeting for the following day. | 12th Aug 1936 | Box 163 \ 3 img047 | |
| Telegram received by telephone regarding the availability of a Merlin motor. | 27th Aug 1936 | Box 163 \ 3 img048 | |
| Telegram confirming the dispatch of MX 5 extensions after a failed telephone call. | 24th Aug 1936 | Box 163 \ 3 img049 | |
| Telegram received by telephone regarding the conversion of a two-brush motor to a four-brush type. | 7th Sep 1936 | Box 163 \ 3 img050 | |
| Telegram received by telephone concerning a works meeting. | 24th Mar 1936 | Box 163 \ 3 img051 | |
| Brief telex-style communication confirming a query about Rodynalite for a motor. | 7th Sep 1936 | Box 163 \ 3 img052 | |
| Telegram asking if the 12-volt motor will be ready for its type test this week. | 14th Sep 1936 | Box 163 \ 3 img053 | |
| Telegram received by telephone regarding the dispatch of a twelve-volt motor for a type test. | 14th Sep 1936 | Box 163 \ 3 img054 | |
| Wire to K.L.G. Sparking Plugs, Ltd. requesting R887 plugs for a type-test. | 18th Sep 1936 | Box 163 \ 3 img055 | |
| Post Office Telegraph confirming the urgent delivery of plugs within seven to ten days. | 18th Sep 1936 | Box 163 \ 3 img056 | |
| Telegram regarding an Air Ministry decision on contact breaker material and the dispatch of a mechanic for a type test. | 26th Sep 1936 | Box 163 \ 3 img057 | |
| Telegram reporting the failure of two EME X5 terminals during a type test and requesting replacements. | 29th Sep 1936 | Box 163 \ 3 img058 | |
| Telegram confirming the arrival details of one passenger. | 23th Sep 1936 | Box 163 \ 3 img059 | |
| Telegram providing the London office address for the United Flexible Metallic Tube Company. | 19th Oct 1936 | Box 163 \ 3 img060 | |
| Urgent telegram to B.T.H. Co. desperately requesting CISE12S magnetos. | 23th Oct 1936 | Box 163 \ 3 img061 | |
| Telegram received by telephone regarding the despatch of two starter motors. | 23th Oct 1936 | Box 163 \ 3 img062 | |
| Telegram confirming the despatch of two starter motors. | 1st Dec 1944 | Box 163 \ 3 img063 | |
| Telegram received by telephone regarding a delay in dispatching Cise 12 S magnetos. | 24th Oct 1936 | Box 163 \ 3 img064 | |
| Telegram message to Gough, Asteroidal, Coventry, regarding a non-received letter. | 5th Nov 1936 | Box 163 \ 3 img065 | |
| Post Office Telegram regarding a query with the Air Ministry about brass bases. | 5th Nov 1931 | Box 163 \ 3 img066 | |
| Inquiry regarding the delivery time for a 24-volt generator. | 6th Nov 1936 | Box 163 \ 3 img067 | |
| Telegram received by telephone regarding the dispatch of a 24-volt generator. | 6th Nov 1936 | Box 163 \ 3 img068 | |
| Telegram advising that a West 24 volt generator will be ready for despatch tomorrow. | 5th Apr 1947 | Box 163 \ 3 img069 | |
| Telex communication to B.T.H. Co. Ltd. regarding the inability to trace magnetos. | 13th Nov 1936 | Box 163 \ 3 img070 | |
| Telegram regarding serious plug trouble. | 17th Nov 1936 | Box 163 \ 3 img071 | |
| Telegram received by telephone concerning an order and collection times from a train. | 20th Nov 1936 | Box 163 \ 3 img072 | |
| Telegram received by telephone regarding the collection of twelve MX 6 items for order 3922. | 20th Nov 1936 | Box 163 \ 3 img073 | |
| Telegram advising collection for order 3922, twelve MX 6 units, from the 2.25 train. | 20th Nov 1936 | Box 163 \ 3 img074 | |
| Short typed message instructing the recipient to inform Thacker not to call on Monday. | 21th Nov 1936 | Box 163 \ 3 img075 | |
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