| Description | Date | Identifier | |
| Letter to Chesterfield Tube Co. requesting the supply of air bottles for the Admiralty. | 15th Oct 1940 | Box 175 \ 3 img218 | |
| Confirmation of handover and specification for 1/4 gallon rectangular oil tins for a 40mm gun. | 15th Oct 1940 | Box 175 \ 3 img219 | |
| Reply to Captain Green regarding responsibility for mounting design during wartime. | 16th Oct 1940 | Box 175 \ 3 img220 | |
| Letter to The British Power Boat Co. Ltd. requesting drawings of a boat's stern for an artistic representation of a gun mounting. | 16th Oct 1940 | Box 175 \ 3 img221 | |
| From the Director of Navy Contracts regarding a charge for adaptors for Q.F. 2 pdr. Mk. XIV. Guns. | 17th Oct 1940 | Box 175 \ 3 img222 | |
| Submission of a design for an identification plate for a 40mm Naval Gun. | 17th Oct 1940 | Box 175 \ 3 img223 | |
| Voucher form for the rail shipment of two drums of mineral lubricating oil. | 17th Oct 1940 | Box 175 \ 3 img224 | |
| Letter to Admiral Whyham enclosing scheme drawing QR.243 for a mounting tested at Portsmouth. | 18th Oct 1940 | Box 175 \ 3 img225 | |
| Modifications to a bronze cradle to fit a shoulder piece, with a final drawing to follow. | 18th Oct 1940 | Box 175 \ 3 img226 | |
| Following up on a telephone conversation and enclosing a consignment note for two drums of mineral lubricating oil. | 19th Oct 1940 | Box 175 \ 3 img227 | |
| Request from the Admiralty for the scrap value of unrequired Oerlikon mounting adapters. | 19th Oct 1940 | Box 175 \ 3 img228 | |
| Modifications to an armrest for a Type BD Naval Gun. | 19th Oct 1940 | Box 175 \ 3 img229 | |
| Drilling, boring, reaming, and rifling operations for 40 m/m barrels. | 20th Oct 1940 | Box 175 \ 3 img230 | |
| Table of specifications for various stages of 40 m/m barrel manufacturing. | 20th Oct 1940 | Box 175 \ 3 img231 | |
| Blueprint detailing the machining operations for a 40mm barrel. | 21th Oct 1940 | Box 175 \ 3 img232 | |
| Blueprint detailing various machining operations on a component. | 21th Oct 1940 | Box 175 \ 3 img233 | |
| Jammed recoil mechanism on Gun No. 11242 due to incorrect assembly. | 18th Oct 1940 | Box 175 \ 3 img234 | |
| Correct procedure for handling an issue with adjustable washers on a Pedestal Mounting Type BD Gun. | 21th Oct 1940 | Box 175 \ 3 img235 | |
| Letter to The British Power Boat Co. Ltd. regarding gun mounting particulars. | 23th Oct 1940 | Box 175 \ 3 img236 | |
| Correspondence regarding a jammed recoil mechanism on a 40mm Naval Gun due to omitted washers during assembly. | 23th Oct 1940 | Box 175 \ 3 img237 | |
| Zone of fire for a Type BD Gun on a Motor Torpedo Boat, referencing blueprint A.24313. | 23th Oct 1940 | Box 175 \ 3 img238 | |
| Letter from the Admiralty acknowledging receipt of a drawing for a 40mm mounting scheme. | 24th Oct 1940 | Box 175 \ 3 img239 | |
| Correspondence concerning alterations to a pedestal gun mounting due to difficulties with the Admiralty. | 24th Oct 1940 | Box 175 \ 3 img240 | |
| Letter from H.M.S. EXCELLENT detailing trial modifications to an ejection chute and a loading platform. | 25th Oct 1940 | Box 175 \ 3 img241 | |
| Small-scale project for a loaders platform on a Type BD Gun. | 26th Oct 1940 | Box 175 \ 3 img242 | |
| Letter to the Admiralty regarding modifications for a QF 2 pdr. Mk. XIV 40 mm. Naval Gun mounting. | 31th Oct 1940 | Box 175 \ 3 img243 | |
| Modifications to adjusting washers for trunnion pins on a 40mm gun mounting. | 25th Oct 1940 | Box 175 \ 3 img244 | |
| Meeting notes concerning the production, mounting, and development of 40mm guns. | 30th Oct 1940 | Box 175 \ 3 img245 | |
| The development and installation of 40mm and half-inch guns, including range modifications and related contracts. | 30th Oct 1940 | Box 175 \ 3 img246 | |
| The need to obtain invoices for expenditures on Oerlikon Mountings parts before submitting a figure to the Admiralty. | 25th Oct 1940 | Box 175 \ 3 img247 | |
| The Type B.3 40 m/m gun mounting, specifically the trunnion pin assembly. | 30th Oct 1940 | Box 175 \ 3 img248 | |
| Letter from The British Aeroplane Co., Ltd. to W.A. Robotham at Rolls-Royce concerning gun and cannon installations on aircraft. | 31th Oct 1940 | Box 175 \ 3 img249 | |
| Letter discussing design considerations for gun ejection and feed mechanisms in turrets. | 1st Jan 1940 | Box 175 \ 3 img250 | |
| Notes on the alignment and range of adjustment for fixed guns on aircraft. | 1st Jan 1940 | Box 175 \ 3 img251 | |
| Specifications for aircraft gun mounting alignment, tolerance, and dispersion. | 1st Jan 1940 | Box 175 \ 3 img252 | |
| Specifications for gun mounting adjustments in two and four-gun turrets. | 1st Jan 1940 | Box 175 \ 3 img253 | |
| Letter to Messrs. Marshall Bros. regarding a sample brush for a 40mm Naval Gun cleaning rod. | 31th Oct 1940 | Box 175 \ 3 img254 | |
| Dispatch request for one gun cleaning brush to Marshall Bros. Ltd. | 31th Oct 1940 | Box 175 \ 3 img255 | |
| Letter to The British Power Boat Co. Ltd. regarding a power mounting for a 40mm gun. | 2nd Nov 1940 | Box 175 \ 3 img256 | |
| The temporary suspension of work on a tool box due to insufficient information. | 4th Nov 1940 | Box 175 \ 3 img257 | |
| Contracts with the Admiralty for gun drawings, tracings, and mounting adaptors. | 5th Nov 1940 | Box 175 \ 3 img258 | |
| Confirmation note for handing over one set of rods for a 40mm Naval Gun clearing brush. | 8th Nov 1940 | Box 175 \ 3 img259 | |
| Requesting payment for a set of rods for a 40 mm Naval Gun. | 8th Nov 1940 | Box 175 \ 3 img260 | |
| Telegram concerning the dispatch of toolkits to Commander You G. at H.M.S. Excellent, Portsmouth. | 12th Nov 1940 | Box 175 \ 3 img261 | |
| Design and provision of a toolbox for a 40mm gun, Type BD. | 12th Nov 1940 | Box 175 \ 3 img262 | |
| The difficulty re-assembling a 40 m/m Type 'BN' Naval Gun No. S.4872. | 12th Nov 1940 | Box 175 \ 3 img263 | |
| The rusty condition of a boat-mounted gun due to exposure to the elements and lack of maintenance. | 10th Oct 1939 | Box 175 \ 3 img264 | |
| Urgent shortage of essential tools for a 40 mm Naval Gun, Type BL. | 12th Nov 1940 | Box 175 \ 3 img265 | |
| Difficulties in designing a tool box for a 40 mm gun due to changing Admiralty specifications. | 17th Nov 1940 | Box 175 \ 3 img266 | |
| Note arguing against the Admiralty's request to include three screwdrivers in a kit when only one is required. | 12th Nov 1940 | Box 175 \ 3 img267 | |
| Letter from R. T. Young to Mr. Robotham regarding the urgent requirement for handbooks and toolboxes. | 12th Nov 1940 | Box 175 \ 3 img268 | |
| The dispatch, tool kits, and disposition of a series of guns. | 19th Nov 1940 | Box 175 \ 3 img269 | |
| Letter to Smiths Jacking System Ltd. following up on a previous request regarding portable hydraulic jacks and trunnion fittings. | 20th Nov 1940 | Box 175 \ 3 img270 | |
| Letter to the Empire Rubber Company requesting a quote and delivery time for a tubular rubber seal for a tool box. | 27th Nov 1940 | Box 175 \ 3 img271 | |
| Confirming the handover of a blueprint for a No. 1 service tool-box for the 40 m/m Naval Gun and discussing its construction. | 28th Nov 1940 | Box 175 \ 3 img272 | |
| Listing the tools and equipment for a 40mm Naval Gun, Type BD, and requesting a sample leather tool roll. | 4th Dec 1940 | Box 175 \ 3 img273 | |
| Letter requesting details for a power-driven mounting for a new gun. | 5th Dec 1940 | Box 175 \ 3 img274 | |
| Letter to Hall & Hall, Ltd. regarding a specific Sorbo rubber mounting for a tool box experiment. | 5th Dec 1940 | Box 175 \ 3 img275 | |
| Requesting another copy of a print (PL.70) for a portable hydraulic jack for Mr D. Sessions. | 6th Dec 1940 | Box 175 \ 3 img276 | |
| Distributing one copy of a drawing and one copy of a preliminary handbook for the 40 mm. Type BD Gun. | 6th Dec 1940 | Box 175 \ 3 img277 | |
| Acknowledgement of receipt for a 40mm gun installation drawing and preliminary handbook. | 7th Dec 1940 | Box 175 \ 3 img278 | |
| Letter to Smith's Jacking Systems Ltd. regarding a proposed bumper fixing for portable hydraulic jacks. | 11th Dec 1940 | Box 175 \ 3 img279 | |
| The design and production of a No. 2 Service Tool Box for a Naval Gun. | 12th Dec 1940 | Box 175 \ 3 img280 | |
| Letter to Mr. Barker of British Power Boat Co. Ltd. enclosing preliminary schemes for a power-driven mounting. | 12th Dec 1940 | Box 175 \ 3 img281 | |
| Letter from The British Power Boat Company requesting information on the weight of an installation with an auxiliary pump and a timeline for fitting. | 19th Dec 1940 | Box 175 \ 3 img282 | |
| The design and production of tool boxes for a 40 m/m Gun, Type HD, for the British Power Boat Co. | 27th Dec 1940 | Box 175 \ 3 img283 | |
| Letter to the British Power Boat Co. Ltd. regarding the prototype power-driven gun mounting and the Admiralty's lack of interest. | 28th Dec 1940 | Box 175 \ 3 img284 | |
| Report from mechanic Morley detailing damage and repairs to a 40 m/m Type 'BD' Naval Gun. | 28th Dec 1940 | Box 175 \ 3 img285 | |
| Cover letter forwarding a request from the Admiralty for detailed lists for designs of tools and equipment. | 29th Dec 1940 | Box 175 \ 3 img286 | |
| The Power Boat Company's disagreement with the Admiralty on the use of power-driven automatic guns. | 30th Dec 1940 | Box 175 \ 3 img287 | |
| Request to return various lock, bolt, and staple samples to the supplier Sidney Russel & Sons Ltd. | 30th Dec 1940 | Box 175 \ 3 img288 | |
| Letter from The British Power Boat Company requesting a weight estimate for an automatic gun. | 31th Dec 1940 | Box 175 \ 3 img289 | |
| Letter from The British Power Boat Company discussing the Admiralty's requirements for a 40mm gun. | 13th Jan 1941 | Box 175 \ 3 img290 | |
| Cover letter for a report on the state of design work in the Gun Installation Section. | 17th Jan 1941 | Box 175 \ 3 img291 | |
| Review of the design position for 40mm and half-inch gun installations in a Beaufighter aircraft. | 15th Jan 1941 | Box 175 \ 3 img292 | |
| Various feed mechanisms and power mounting for a 40 M.M. gun. | 15th Jan 1941 | Box 175 \ 3 img293 | |
| Gun feed positions, power mountings, and the potential installation of a ½' gun in a Spitfire aircraft. | 15th Jan 1941 | Box 175 \ 3 img294 | |
| Installation and modification of Browning guns in Spitfire aircraft bays. | 15th Jan 1941 | Box 175 \ 3 img295 | |
| Letter to the British Power Boat Co. regarding a report on the 40mm gun and arranging for its servicing before a boat launch. | 18th Jan 1941 | Box 175 \ 3 img296 | |
| Secret report detailing the results and issues from gun trials on M.A./S.B. No: 19. | 31th Dec 1940 | Box 175 \ 3 img297 | |
| Failures, defects, and missing components of a gun. | 18th Dec 1940 | Box 175 \ 3 img298 | |
| Letter discussing the feasibility of a 300 rounds per minute gun and arranging a demonstration. | 19th Jan 1941 | Box 175 \ 3 img299 | |
| Invoice details and expenditure claim for a cancelled order of a Sample Gun Mounting QPL124. | 23th Jan 1941 | Box 175 \ 3 img300 | |
| Letter from the British Power Boat Company discussing gun specifications and arranging a demonstration. | 24th Jan 1941 | Box 175 \ 3 img301 | |
| Clarifying that an order for a sample gun mounting was not cancelled and requests payment. | 27th Jan 1941 | Box 175 \ 3 img302 | |
| Request for two prints of the latest Vertical Magazine for a 40 m.m. gun. | 29th Jan 1941 | Box 175 \ 3 img303 | |
| Weight balancing and material selection for an enlarged face shield on a Type BD gun. | 31th Jan 1941 | Box 175 \ 3 img305 | |
| The increased size and weight balance of the Enlarged Face Shield Type BD Gun. | 5th Feb 1941 | Box 175 \ 3 img306 | |
| Two alternative design solutions for an enlarged face shield on a Type 'D' gun. | 6th Feb 1941 | Box 175 \ 3 img307 | |
| Delaying schemes until feedback is received from Commander Young regarding extra weight in an armrest. | 20th May 1938 | Box 175 \ 3 img308 | |
| Request to arrange the installation of a Powered Mounting and jettison system on a 15th cwt Army Truck. | 10th Feb 1941 | Box 175 \ 3 img309 | |
| Relative merits of forward and rear magazines for 40mm guns. | 11th Feb 1941 | Box 175 \ 3 img310 | |
| Description of a forward type gun magazine, its loading cycle, and safety interlock mechanisms. | 11th Feb 1941 | Box 175 \ 3 img311 | |
| Letter to the British Power Boat Company regarding a demonstration of a 40 mm gun and power-driven mounting. | 27th Feb 1941 | Box 175 \ 3 img312 | |
| Letter from The British Power Boat Company regarding gunnery trials for a 40 mm gun. | 13th Mar 1941 | Box 175 \ 3 img313 | |
| Letter to Smith's Jacking Systems enquiring about a replacement engine-driven pump for a hydraulic jack system on a truck. | 17th Mar 1941 | Box 175 \ 3 img314 | |
| Letter to The British Power Boat Co. Ltd. regarding the availability of a 40 mm power-driven gun mounting. | 18th Mar 1941 | Box 175 \ 3 img315 | |
| Letter from The British Power Boat Company, Ltd. to Mr. Robotham regarding waiting for a gun to be sent South. | 22th Mar 1941 | Box 175 \ 3 img316 | |
| Letter about a new sample radiator thermometer for an outstanding order of 500 units. | 20th Apr 1920 | Box 175 \ 4 img001 | |
| Sample thermometer from the Cambridge & Paul Instrument Company for the instrument board. | 23th Apr 1920 | Box 175 \ 4 img002 | |
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