| Description | Date | Identifier | |
| Confirming a discussion on gun installation schemes for aircraft wings and turrets. | 4th Jul 1940 | Box 175 \ 3 img118 | |
| Delivery and testing of a naval gun mounting to be adapted for a 40 mm gun. | 4th Jul 1940 | Box 175 \ 3 img119 | |
| L.M.S. Railway consignee's copy consignment note for goods sent from Coventry Depot. | 7th Jul 1940 | Box 175 \ 3 img120 | |
| Listing parts and blueprints for a 40mm gun on an Oerlikon mounting. | 10th Jul 1940 | Box 175 \ 3 img121 | |
| Attachment of a 40 m.m. gun to an Oerlikon Mounting. | 10th Jul 1940 | Box 175 \ 3 img122 | |
| Request for drawings showing the external configuration of a 40 m.m. gun for an Oerlikon mounting. | 12th Jul 1940 | Box 175 \ 3 img123 | |
| Temporary scheme for mounting a 40 m.m. gun on an Oerlikon mounting. | 13th Jul 1940 | Box 175 \ 3 img124 | |
| Analysis of gun and ammunition weights for fighter aircraft. | 13th Jul 1940 | Box 175 \ 3 img125 | |
| Post Office telegram to Robotham at Roycar Derby to confirm a visit from Selman Power. | 4th Sep 1940 | Box 175 \ 3 img126 | |
| Letter to Messrs. Hampton & Sons Ltd. regarding the production of two sample belts for a 40mm gun. | 5th Sep 1940 | Box 175 \ 3 img127 | |
| Letter to Commander Robertson regarding a list of spares and the proofing of guns manufactured by the British United Shoe Machine Co. | 5th Sep 1940 | Box 175 \ 3 img128 | |
| Letter to Commander Gilbert regarding an instruction book, trial weapons, and an Oerlikon handbook. | 6th Sep 1940 | Box 175 \ 3 img129 | |
| Typed message to Supermarin's Chief Designer regarding a power boat gun installation. | 6th Sep 1940 | Box 175 \ 3 img130 | |
| Message for Robotham from the Admiralty confirming the arrival details of Mr. Baird. | 8th Sep 1940 | Box 175 \ 3 img131 | |
| Letter from the Naval Ordnance Department concerning the development and procurement of automatic and semi-automatic guns. | 9th Sep 1940 | Box 175 \ 3 img132 | |
| Letter to Vickers-Armstrong Ltd. regarding the testing of the Griffon engine mounting and a prototype aircraft power plant. | 10th Sep 1940 | Box 175 \ 3 img133 | |
| Issuance of vouchers for Oerliken hulps. | 16th Apr 1943 | Box 175 \ 3 img134 | |
| Yard issue note for the delivery of Griffon engine mountings for an aircraft. | 16th Apr 1943 | Box 175 \ 3 img135 | |
| Letter to The British Power Boat Co. Ltd. regarding the development status of a power-driven gun mounting for a prototype boat. | 10th Sep 1940 | Box 175 \ 3 img136 | |
| Requesting particulars of spares, a pressure gauge, tool kit, and other miscellaneous pieces for a gun. | 11th Sep 1940 | Box 175 \ 3 img137 | |
| Outlining the programme for the first and second service trials of the 40 m.m. Naval Gun type BD. | 11th Sep 1940 | Box 175 \ 3 img138 | |
| Production and development of guns, including materials, mountings, and collaboration with external companies. | 11th Sep 1940 | Box 175 \ 3 img139 | |
| Fabricating an experimental power mounting for a turret base. | 11th Sep 1940 | Box 175 \ 3 img140 | |
| Appendix sheet listing parts and reference numbers for a First Service Trials Gun. | 11th Sep 1940 | Box 175 \ 3 img141 | |
| Appendix sheet listing components and part numbers for the Second Service Trials Gun. | 11th Sep 1940 | Box 175 \ 3 img142 | |
| Letter to Commander Young of the Royal Navy confirming details for a gun supply, including armour plating modifications. | 11th Sep 1940 | Box 175 \ 3 img143 | |
| Correspondence regarding the delivery and mounting of guns with associated armoured shields and lockers. | 11th Sep 1940 | Box 175 \ 3 img144 | |
| Letter from the Director of Naval Ordnance confirming a gun mounting for Motor A/S boat No: 15. | 11th Sep 1940 | Box 175 \ 3 img145 | |
| Letter to Commander Young confirming details for an Oerlikon gun mounting, including armour modifications and supplied accessories. | 11th Sep 1940 | Box 175 \ 3 img146 | |
| Letter detailing the progress and delivery schedule for guns and related mountings, including the Oerlikon and pedestal types. | 11th Sep 1940 | Box 175 \ 3 img147 | |
| Letter to the British Power Boat Co. Ltd. discussing Admiralty specifications for gun armour plate and mounting weights. | 11th Sep 1940 | Box 175 \ 3 img148 | |
| Development of pedestal mountings and light ammunition boxes for military applications. | 11th Sep 1940 | Box 175 \ 3 img149 | |
| Letter to the Naval Ordnance Department regarding a fully automatic 40mm gun. | 13th Sep 1940 | Box 175 \ 3 img150 | |
| The design specifications and modifications for a Face Armour Shield (Type BD) for a Naval Gun. | 13th Sep 1940 | Box 175 \ 3 img151 | |
| The design, materials, and manufacturing costs for an armrest on an ED type naval gun. | 13th Sep 1940 | Box 175 \ 3 img152 | |
| Revised design of armour shields for a type BD Naval Gun with an Oerlikon mounting. | 13th Sep 1940 | Box 175 \ 3 img153 | |
| The delivery of the 40 mm Naval Gun Type BL. | 13th Sep 1940 | Box 175 \ 3 img154 | |
| Spare parts list for a 40 mm Naval Gun, Type BD. | 14th Sep 1940 | Box 175 \ 3 img155 | |
| Secret memo discussing the design and issues with armour shields for a type BD Gun on an Oerlikon Mounting. | 14th Sep 1940 | Box 175 \ 3 img156 | |
| Letter to Commander Young regarding the dispatch of a gun and a delay in its delivery. | 16th Sep 1940 | Box 175 \ 3 img157 | |
| Letter to the Admiralty regarding a change in instructions for a gun mounting and the status of its manufacture. | 16th Sep 1940 | Box 175 \ 3 img158 | |
| Letter clarifying the required mounting for a second gun, discussing an Oerlikon mounting and concerns over shield weight. | 16th Sep 1940 | Box 175 \ 3 img159 | |
| Letter to the British Power Boat Co. regarding a change by the Admiralty to a lightened, pedestal type of gun mounting. | 16th Sep 1940 | Box 175 \ 3 img160 | |
| Letter from the Director of Navy Contracts confirming the cancellation of an order for Mark XIV Guns. | 16th Sep 1940 | Box 175 \ 3 img161 | |
| The design and quantity requirements for a 40mm Naval Gun, Type BD, body strap. | 16th Sep 1940 | Box 175 \ 3 img162 | |
| Letter from Hampton & Sons Ltd. concerning revised Body Straps for a 40 mm. Type BL. Gun. | 23th Sep 1940 | Box 175 \ 3 img163 | |
| Request for information on best naval practice for a gun tool box, addressed to Commander Young at H.M.S. Excellent. | 17th Sep 1940 | Box 175 \ 3 img164 | |
| Letter from the British Power Boat Company regarding a proposal to design a lightweight ammunition box. | 17th Sep 1940 | Box 175 \ 3 img165 | |
| The Admiralty's change of requirements for 40mm gun mountings. | 17th Sep 1940 | Box 175 \ 3 img166 | |
| Modification of armrests for type BD Naval Gun bronze cradles. | 18th Sep 1940 | Box 175 \ 3 img167 | |
| Confirming details about armour shields for a Type BD Naval Gun on a non-elevating mounting. | 18th Sep 1940 | Box 175 \ 3 img168 | |
| Manufacturing queries and issues with the first sample of a 40 m/m Naval Gun mounting. | 18th Sep 1940 | Box 175 \ 3 img169 | |
| Drawings and correspondence with LMS and the Admiralty regarding weapon mountings and armour. | 19th Sep 1940 | Box 175 \ 3 img170 | |
| Letter from The British Power Boat Company thanking for advice and confirming they will be supplied with a lightweight pedestal type of mounting. | 19th Sep 1940 | Box 175 \ 3 img171 | |
| Supply of standard spanners for the tool kit of a 40 mm Naval Gun, Type BL. | 20th Sep 1940 | Box 175 \ 3 img172 | |
| Letter from the C.I.N.O. Department clarifying proofing and inspection procedures for guns. | 26th Sep 1940 | Box 175 \ 3 img173 | |
| Gun deliveries and the logistics of fitting shields to mountings. | 21th Sep 1940 | Box 175 \ 3 img174 | |
| Copy of a telegram from the Admiralty regarding priority delivery instructions for gun mountings. | 21th Sep 1940 | Box 175 \ 3 img175 | |
| Letter to British Power Boat Co. Ltd. regarding the design of a light ammunition box. | 21th Sep 1940 | Box 175 \ 3 img176 | |
| Letter to the Naval Ordnance Department regarding notes and a print for the mounting of naval guns. | 19th Sep 1940 | Box 175 \ 3 img177 | |
| Mounting for the 40 mm Naval Gun, Type BD, confirming the Oerlikon mounting will not be used. | 23th Sep 1940 | Box 175 \ 3 img178 | |
| Notes on a telephone conversation regarding mountings and shields for the Type BD Naval Gun. | 19th Sep 1940 | Box 175 \ 3 img179 | |
| Confirming a telephone conversation regarding an order for 12 S.104 name plates for a 40mm Naval Gun, Type BD. | 23th Sep 1940 | Box 175 \ 3 img180 | |
| Letter from H.M.S. EXCELLENT concerning Oerlikon mountings and requirements for a tool box. | 23th Sep 1940 | Box 175 \ 3 img181 | |
| Modifications to the Recoil Shield Type BD Gun. | 24th Sep 1940 | Box 175 \ 3 img182 | |
| Layout of toolbox trays and equipment for a 40 m/m Gun - Type BD. | 24th Sep 1940 | Box 175 \ 3 img183 | |
| Visit to a supplier to source a half-gallon recoil fluid can, listing potential firms and pricing. | 24th Sep 1940 | Box 175 \ 3 img184 | |
| Letter to The Admiralty regarding adaptors and shields for Q.F. 2 pdr. Mark XIV guns to fit Oerlikon mountings. | 24th Sep 1940 | Box 175 \ 3 img185 | |
| The installation and service trials for a 40 m/m Type 'BD' Naval Gun. | 25th Sep 1940 | Box 175 \ 3 img186 | |
| Letter regarding the delivery and upcoming firing trials for a 40 m/m gun, listing three points for attention. | 23th Sep 1940 | Box 175 \ 3 img187 | |
| Request to increase an order to cover 50 plates mentioned in previous correspondence. | 26th Sep 1940 | Box 175 \ 3 img188 | |
| Name plates for a 40mm Naval Gun, referencing a letter from Rudd & Co. | 26th Sep 1940 | Box 175 \ 3 img189 | |
| Very urgent purchase order for chemically engraved brass name plates sent to Messrs. E. Rudd & Co. | 21th Sep 1940 | Box 175 \ 3 img190 | |
| Letter to the British Power Boat Co. Ltd. regarding gun trials and a power-driven mounting for a boat. | 29th Sep 1940 | Box 175 \ 3 img191 | |
| Letter to London, Midland & Scottish Railways Ltd. concerning a design discrepancy in a 40mm gun mounting. | 30th Sep 1940 | Box 175 \ 3 img192 | |
| The charging and supply of pedestal mountings for a 40 m/m Type 'BD' Naval Gun. | 30th Sep 1940 | Box 175 \ 3 img193 | |
| Letter to the British Power Boat Company regarding a Type BD pedestal-mounted gun. | 1st Oct 1940 | Box 175 \ 3 img194 | |
| Letter discussing the arrangement for jig drilling bolt holes on a mounting base. | 1st Oct 1940 | Box 175 \ 3 img195 | |
| Letter to British Power Boat Co. Ltd. detailing the specifications for a new power-driven mounting for a 40mm gun. | 1st Oct 1940 | Box 175 \ 3 img196 | |
| Adjusting washers for the trunnion pins of a 40 m/m BD type gun's naval mounting. | 1st Oct 1940 | Box 175 \ 3 img197 | |
| Letter outlining five modifications for the 2 Pdr. Q.F. Mark IIV Gun. | 3rd Oct 1940 | Box 175 \ 3 img198 | |
| Letter from the Chief Engineer of the Armaments Division regarding gun modifications and proofing. | 3rd Oct 1940 | Box 175 \ 3 img199 | |
| Letter from L.M. & S. regarding alterations and production arrangements for 40mm gun mountings. | 3rd Oct 1940 | Box 175 \ 3 img200 | |
| Letter to The British Power Boat Co. regarding the dispatch of a gun barrel extension for a Motor A/S Boat. | 3rd Oct 1940 | Box 175 \ 3 img201 | |
| Letter to London, Midland & Scottish Railways regarding drawings for a prototype mounting and gun. | 4th Oct 1940 | Box 175 \ 3 img202 | |
| Attaching photographs of a pedestal type mounting complete with the latest armour plate. | 4th Oct 1940 | Box 175 \ 3 img203 | |
| Photograph of a 40mm Naval Gun pedestal, type B.D., MII. | 16th Sep 1940 | Box 175 \ 3 img204 | |
| Photograph of a pedestal mount for a 40mm naval gun. | 26th Aug 1940 | Box 175 \ 3 img205 | |
| Letter from the British Power Boat Company discussing successful gun trials and proposing a collaboration on a power-driven mounting. | 5th Oct 1940 | Box 175 \ 3 img206 | |
| Progress and issues related to various gun installation projects. | 5th Oct 1940 | Box 175 \ 3 img207 | |
| Progress report on the 40 m.m. Gun & Beaufighter project. | 1st Oct 1940 | Box 175 \ 3 img208 | |
| Letter to Captain Green confirming responsibility for prototype 40 mm Mk. XIV gun mountings and discussing modifications by L.M. & S. Railways. | 6th Oct 1940 | Box 175 \ 3 img209 | |
| Dispute over modifications made by L.M. & S. to a 4 O. mm. gun mounting. | 6th Oct 1940 | Box 175 \ 3 img210 | |
| The ordering of pressure gauges from Hopkinsons for guns. | 8th Oct 1940 | Box 175 \ 3 img211 | |
| Requesting official confirmation from the Admiralty regarding the satisfaction of Arm Rests and Gunners Belts for a 40 m/m Type 'BD' Naval Gun. | 10th Oct 1940 | Box 175 \ 3 img212 | |
| Letter to S.N. Barker of British Power Boat Co. Ltd., acknowledging correspondence and promising to submit a preliminary scheme. | 10th Oct 1940 | Box 175 \ 3 img213 | |
| Production Gun Mounting, specifically the Non-Elevating Pedestal Mounting Type B.3. | 14th Oct 1940 | Box 175 \ 3 img214 | |
| Letter from the Admiralty to Mr. Robotham regarding design, production, and responsibility for prototype mountings. | 14th Oct 1940 | Box 175 \ 3 img215 | |
| Request to send an official order to The Metal Box Co. Ltd. for 3 1/2 gallon oil cans for a 40mm gun. | 15th Oct 1940 | Box 175 \ 3 img216 | |
| Letter to The British Oxygen Co. Ltd. regarding the urgent procurement of 500 air bottles for the Admiralty. | 15th Oct 1940 | Box 175 \ 3 img217 | |
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