| Description | Date | Identifier | |
| Telegram from Robotham to Selman about scheduling a meeting. | 4th Sep 1940 | Box 175 \ 3 img018 | |
| Letter to the Director of Navy Contracts returning an order for semi-automatic guns as production was taken over by another company. | 4th Sep 1940 | Box 175 \ 3 img019 | |
| Notes of a discussion held on the 2nd September regarding the 40 mm. gun. | 4th Sep 1940 | Box 175 \ 3 img020 | |
| Meeting notes discussing the production details of guns, including materials, pricing, tooling, testing, and assembly. | 4th Sep 1940 | Box 175 \ 3 img021 | |
| Meeting minutes discussing bronze cradle machining, contracts with the Admiralty for guns, and mountings. | 4th Sep 1940 | Box 175 \ 3 img022 | |
| Correspondence returning one drawing and requesting prints for a 17.2mm and a 40mm gun arrangement. | 16th Jul 1940 | Box 175 \ 3 img023 | |
| Request for an official order to the British Tyre & Rubber Co. for rubber covering the mock-up shoulder rest of a 40 m/m gun. | 16th Jul 1940 | Box 175 \ 3 img024 | |
| Letter confirming an order to cover a tubular Gun Shoulder Rest with soft rubber. | 16th Jul 1940 | Box 175 \ 3 img025 | |
| Request for a copy of the latest 40 m/m mark '3' Gun arrangement drawing. | 17th Jul 1940 | Box 175 \ 3 img026 | |
| Confirming arrangements for a visit to the R.A.E. on an upcoming Saturday. | 18th Jul 1940 | Box 175 \ 3 img027 | |
| Letter from British Tyre & Rubber Co. confirming completion of work on a Shoulder Rest. | 18th Jul 1940 | Box 175 \ 3 img028 | |
| From British Type & Rimber Co. Ltd. regarding an order for a rubber-covered Showfan Screen. | 14th Jul 1940 | Box 175 \ 3 img029 | |
| Oerlikon Mounting 3.SLa for the 40 m/m Naval Gun Mark V, detailing mounting discrepancies and sight modifications. | 19th Jul 1940 | Box 175 \ 3 img030 | |
| The low stresses on a mounting under a trunnion load, in preparation for a meeting with Naval Authorities. | 19th Jul 1940 | Box 175 \ 3 img031 | |
| Cover note for D.184 Vouchers concerning an Oerlikon Gun mounting, requesting a signature for receipt. | 12th Nov 1940 | Box 175 \ 3 img032 | |
| Yard Issue Note for the delivery of three castle nuts for an MS.2 test. | 12th Nov 1940 | Box 175 \ 3 img033 | |
| The design challenges and supply requirements for the Oerlikon 40 m/m Gun Mounting. | 27th Jul 1940 | Box 175 \ 3 img034 | |
| Letter from the Admiralty regarding drawings for Oerlikon Gun Mountings. | 29th Jul 1940 | Box 175 \ 3 img035 | |
| Outlining queries about an armoured shield and sights for a 40mm Mark V Naval Gun on an Oerlikon Mounting. | 30th Jul 1940 | Box 175 \ 3 img036 | |
| List of design questions and considerations for a weapon mounting system. | 30th Jul 1940 | Box 175 \ 3 img037 | |
| Outlining points to be clarified regarding a manually operated mounting for a 2nd. 2S. gun. | 30th Jul 1940 | Box 175 \ 3 img038 | |
| Letter to the Director of Navy Contracts regarding the design and manufacture of an armoured shield for a 40mm gun. | 5th Aug 1940 | Box 175 \ 3 img039 | |
| Minutes from a conference with the Admiralty regarding the urgent demand for a gun for anti-invasion craft. | 4th Mar 1940 | Box 175 \ 3 img040 | |
| Gun production, including tooling, the use of sub-contractors, and materials for barrels. | 8th Aug 1940 | Box 175 \ 3 img041 | |
| Report discussing gun production, including material changes from aluminium to bronze, and outlining design responsibilities for mountings and shields. | 1st Jun 1942 | Box 175 \ 3 img042 | |
| Notes from a conference with the Admiralty regarding a gun contract and supply urgency. | 9th Aug 1940 | Box 175 \ 3 img043 | |
| Meeting minutes discussing the planning, tooling, and sub-contracting for gun and barrel production. | 3rd Jun 1940 | Box 175 \ 3 img044 | |
| Meeting summary discussing gun production, materials, and mounting designs. | 8th Sep 1940 | Box 175 \ 3 img045 | |
| Plan Q.PL.110, showing the original sights, armrest, and aiming handle for the 40 M.M. Gun Type B.D. | 5th Aug 1940 | Box 175 \ 3 img046 | |
| Design and attachment of a 40mm gun ammunition box tray. | 6th Aug 1940 | Box 175 \ 3 img047 | |
| Project memo regarding a simplified elevating mounting for a 40mm Oerlikon gun. | 6th Aug 1940 | Box 175 \ 3 img048 | |
| The investigation into different mounting projects for a 40mm Type BD gun. | 6th Aug 1940 | Box 175 \ 3 img049 | |
| Distribution note for issuing and filing purposes. | 6th Aug 1940 | Box 175 \ 3 img050 | |
| Secret memorandum regarding a simplified elevating mounting for a 40 m.m. B.D. Gun. | 6th Aug 1940 | Box 175 \ 3 img051 | |
| The design and sourcing of ball bearings for a 40 m.m. gun mounting for the Navy. | 6th Aug 1940 | Box 175 \ 3 img052 | |
| Specifying the thrust and instantaneous radial load on a bearing for a gun. | 6th Aug 1940 | Box 175 \ 3 img053 | |
| Specifications and mounting of an ammunition box tray for a 40mm gun. | 6th Aug 1940 | Box 175 \ 3 img054 | |
| Letter to The International Combustion Co. Ltd. regarding a proposed mounting, referencing drawing QFL. 112 and requesting modification suggestions. | 7th Aug 1940 | Box 175 \ 3 img055 | |
| Attachment of a 40 m.m. Naval Gun Type BD to an Oerlikon Mounting. | 7th Aug 1940 | Box 175 \ 3 img056 | |
| Design changes and finishing instructions for a weapon mounting. | 7th Aug 1940 | Box 175 \ 3 img057 | |
| Letter from The British Power Boat Company concerning the mounting of a new gun. | 7th Aug 1940 | Box 175 \ 3 img058 | |
| Blueprint with handwritten calculations for weight saved by substituting uprights and adding a Birmabright cover. | 6th Jul 1942 | Box 175 \ 3 img059 | |
| Blueprint for a suggested lightening hinge on an Oerlikon gun mounting. | 6th Jul 1942 | Box 175 \ 3 img060 | |
| Letter from International Combustion Ltd regarding the manufacture of a mounting based on drawing CPL.112. | 8th Aug 1940 | Box 175 \ 3 img061 | |
| Design change of an accelerometer for a gun barrel from a capacity arrangement to a variable inductance system. | 9th Aug 1940 | Box 175 \ 3 img062 | |
| Final design of the armrest for the 40 m.m. Naval Gun Type BD. | 9th Aug 1940 | Box 175 \ 3 img063 | |
| Design, modifications, and finish for a 40mm Naval Gun ejector shield. | 9th Aug 1940 | Box 175 \ 3 img064 | |
| Urgent need for a rubberised downward stop for a 40mm Naval Gun, proposing a new buffer design. | 9th Aug 1940 | Box 175 \ 3 img065 | |
| Letter deferring a matter due to concerns about literature falling into enemy hands. | 10th Aug 1940 | Box 175 \ 3 img066 | |
| Letter to International Combustion Ltd. regarding the manufacture of mountings. | 10th Aug 1940 | Box 175 \ 3 img067 | |
| Design of the aiming handle for the 40mm Naval Gun type BD. | 10th Aug 1940 | Box 175 \ 3 img068 | |
| Letter to the British Power Boat Co. concerning proposed gun mounting specifications. | 12th Aug 1940 | Box 175 \ 3 img069 | |
| Letter to The British Power Boat Co. Ltd. concerning a drawing for a new type of mounting. | 13th Aug 1940 | Box 175 \ 3 img070 | |
| Programme of experimental work on the R.R. 40 MM. Gun, detailing trials for the loading mechanism, barrel temperature and buffer fillings. | 14th Aug 1940 | Box 175 \ 3 img071 | |
| Further tests for a gun, including buffer fluid trials, load measurement, and mounting preparations for a Beaufighter aircraft. | 14th Aug 1940 | Box 175 \ 3 img072 | |
| Letter to The Admiralty regarding a proposed simplified pedestal mounting for a 40 m/m gun. | 15th Jun 1940 | Box 175 \ 3 img073 | |
| Fitting of four 1/2 inch guns to a Spitfire wing and the resulting limitations. | 15th Aug 1940 | Box 175 \ 3 img074 | |
| Letter to the Admiralty proposing a simplified pedestal mounting for 40 m/m guns. | 15th Aug 1940 | Box 175 \ 3 img075 | |
| Providing and designing armour shields for 40 m.m. Naval Guns on an Oerlikon Mounting. | 16th Aug 1940 | Box 175 \ 3 img076 | |
| Gunner's vision from the left-hand and right-hand sides. | 16th Aug 1940 | Box 175 \ 3 img077 | |
| Secret memorandum about the design and provision of armour shields for the 40 m.m. Naval Gun. | 16th Aug 1940 | Box 175 \ 3 img078 | |
| Gunner's vision on the left and right hand sides. | 17th Aug 1940 | Box 175 \ 3 img079 | |
| Parts list for the armouring of a 40 m/m Naval Gun, Type BD. | 17th Aug 1940 | Box 175 \ 3 img080 | |
| Blueprints for the 40mm Naval Gun Type BD, Cradle & Fittings. | 17th Aug 1940 | Box 175 \ 3 img081 | |
| Instruction to scrap advance prints due to slight modifications on the pattern. | 12th Aug 1941 | Box 175 \ 3 img082 | |
| Drainpipe mounting for a 40 mm. naval gun, type BD. | 17th Aug 1940 | Box 175 \ 3 img083 | |
| Letter to The British Power Boat Co. Ltd. regarding a Gun Mounting for a 40 m.m. type BL Gun. | 14th Aug 1940 | Box 175 \ 3 img084 | |
| Letter to a supplier requesting information and samples for hooks, eyes, and buckles for webbing equipment. | 19th Aug 1940 | Box 175 \ 3 img085 | |
| Letter to Smiths Ja king Systems Ltd. regarding the design and modification of a large hydraulic jack. | 20th Aug 1940 | Box 175 \ 3 img086 | |
| Concluding page of a letter mentioning an attached rough sketch of a mechanism. | 14th Feb 1943 | Box 175 \ 3 img087 | |
| Modifications to the 40 M.M. Naval Gun - Oerlikon Mounting & Fittings. | 14th Feb 1943 | Box 175 \ 3 img088 | |
| Confirming a scheme for recoil shields for Type BD 40 m.m. guns. | 20th Aug 1940 | Box 175 \ 3 img089 | |
| The urgent production of an armour plate mock-up for an Oerlikon gun mounting. | 20th Aug 1940 | Box 175 \ 3 img090 | |
| Blueprints for the Mountings & Fittings of a 40 m/m Naval Gun Oerlikon Mounting. | 20th Jun 1940 | Box 175 \ 3 img091 | |
| Confirmation of a telegram sent to Roycar Derby regarding a missing gun drawing. | 21th Aug 1940 | Box 175 \ 3 img092 | |
| Letter from the Admiralty regarding a proposed 40mm gun mounting and shield. | 21th Aug 1940 | Box 175 \ 3 img093 | |
| Letter from The British Power Boat Company confirming a telegram and urgently requesting a drawing. | 21th Aug 1940 | Box 175 \ 3 img094 | |
| Request to Mr. Hardy of Clan Foundry to produce parts for an accelerometer for a 40 m/m gun recoil mechanism. | 21th Aug 1940 | Box 175 \ 3 img095 | |
| Parts and modifications for a recoil shield on a 40 m/m Naval Gun. | 21th Aug 1940 | Box 175 \ 3 img096 | |
| Instruction memo requesting modification of cradle drawings and listing required standard parts. | 19th Aug 1940 | Box 175 \ 3 img097 | |
| Modifications to sight bracket positions for an Aluminium cradle on a BD type Naval Gun. | 22th Aug 1940 | Box 175 \ 3 img098 | |
| Letter to Smiths Jacking Systems Ltd. regarding prints for a pump, ram, and tank, confirming their parts are more suitable than the Hydrolift jack. | 23th Aug 1940 | Box 175 \ 3 img099 | |
| Letter to The British Power Boat Co. Ltd. regarding the delay and design of a non-elevating mounting for a 40 m.m. type BD gun. | 23th Aug 1940 | Box 175 \ 3 img100 | |
| Letter to the Admiralty regarding the specification of a top ball bearing. | 23th Aug 1940 | Box 175 \ 3 img101 | |
| The addition of a Knob, Ejector, Trip for the 40 mm Naval Gun Type BS. | 24th Aug 1940 | Box 175 \ 3 img102 | |
| Final design for a 40 m.m. type BD Gun Aiming Handle & Body Sling Attachment. | 24th Aug 1940 | Box 175 \ 3 img103 | |
| Letter from the Royal Arsenal requesting to see the design or drawings for an attachment for a 40mm A.A. mounting. | 27th Sep 1939 | Box 175 \ 3 img104 | |
| Acknowledgement of receipt for drawings related to a 40mm Mk.I gun from the Armaments Inspection Department. | 3rd Oct 1939 | Box 175 \ 3 img105 | |
| Letter to the Chief Superintendent of Design regarding design schemes for the Bofors Gun. | 3rd Oct 1939 | Box 175 \ 3 img106 | |
| Proposed trip to Woolwich Arsenal regarding sights made for the Bofors gun. | 5th Oct 1939 | Box 175 \ 3 img107 | |
| Letter from the Royal Arsenal's Design Department acknowledging receipt of a prior communication. | 6th Oct 1939 | Box 175 \ 3 img108 | |
| Short memo from Rm. to Ve. regarding a visit to Frazer Nash and an attempt to loan a .5 Browning. | 24th Oct 1939 | Box 175 \ 3 img109 | |
| Arrangements for a visit to Bristol Aeroplane Co. to discuss fitting a 40mm cannon into a Beaufighter. | 9th Nov 1939 | Box 175 \ 3 img110 | |
| Visit to Boscombe Down to assess the installation of proposed 15mm guns in place of .303 guns on Spitfire and Hurricane aircraft. | 18th Jan 1940 | Box 175 \ 3 img111 | |
| Examination of gun installations on various British aircraft. | 18th Jan 1940 | Box 175 \ 3 img112 | |
| Page discussing cramped gun installations and requesting drawings of Spitfire, Hurricane, and Nash & Thompson turrets. | 18th Jan 1940 | Box 175 \ 3 img113 | |
| Requesting statistics on gun and ammunition loads for Spitfire and Hurricane aircraft. | 9th Feb 1940 | Box 175 \ 3 img114 | |
| Letter to Commander Oswald of the Admiralty, enclosing a blueprint of a Nash and Thompson Turret. | 14th Nov 1940 | Box 175 \ 3 img115 | |
| Clarifying that guns and mountings are to be regarded as separate units for all processes, and defining the scope of their respective index sheets. | 29th Jun 1940 | Box 175 \ 3 img116 | |
| Prefix letters for issuing drawings related to gun schemes, details, and mountings. | 24th May 1918 | Box 175 \ 3 img117 | |
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