| Description | Date | Identifier | |
| Follow-up letter to Messrs. George Angus & Co. regarding petrol pump diaphragm material and a gasket. | 17th Dec 1936 | Box 152 \ 1 scan0218 | |
| Letter to Gordon Armstrong Patent Suspension Co. Ltd. discussing the testing and development of dampers with spring-loaded valves. | 21th Dec 1936 | Box 152 \ 1 scan0219 | |
| Letter from Gordon Armstrong discussing the supply and testing of different shock absorber spindles and valves. | 17th Dec 1936 | Box 152 \ 1 scan0220 | |
| Letter from Gordon Armstrong Patent Suspension Co. regarding drawings and the supply of sample shock absorbers. | 17th Dec 1936 | Box 152 \ 1 scan0221 | |
| Advice note from Armstrong's Patents Co. Ltd. regarding the dispatch of a pair of shock absorbers. | 18th Dec 1936 | Box 152 \ 1 scan0222 | |
| Letter from Gordon Armstrong Patent Suspension regarding suspension design, specifically shaft diameter and spring-loaded valves. | 23th Dec 1936 | Box 152 \ 1 scan0223 | |
| Letter from Gordon Armstrong discussing the performance of newly fitted shock absorbers on a Bentley car. | 23th Dec 1936 | Box 152 \ 1 scan0224 | |
| Letter to the Gordon Armstrong Patent Suspension Co. Ltd. regarding damper squeaking and knocking issues. | 29th Dec 1936 | Box 152 \ 1 scan0225 | |
| Letter from Gordon Armstrong Patent Suspension Company regarding shock absorber valves and shafts. | 30th Dec 1936 | Box 152 \ 1 scan0226 | |
| Letter from Gordon Armstrong Patent Suspension Co. regarding spindle drawings and other components. | 31th Dec 1936 | Box 152 \ 1 scan0227 | |
| Suggested design for a mechanical component showing multiple views and a cross-section. | 16th Nov 1936 | Box 152 \ 1 scan0228 | |
| Technical drawing of a forged crank with a serrated bore and raised letters. | 16th Nov 1936 | Box 152 \ 1 scan0229 | |
| Engineering drawing of a serrated spindle with dimensions and material specifications. | 30th Sep 1936 | Box 152 \ 1 scan0230 | |
| Letter from Gordon Armstrong Patent Suspension regarding two replacement valves sent to cure a squeak, along with an assembly drawing. | 1st Jan 1937 | Box 152 \ 1 scan0231 | |
| Letter regarding handling decisions about shock absorbers before an upcoming trip. | 4th Jan 1936 | Box 152 \ 1 scan0232 | |
| Letter from Gordon Armstrong Patent Suspension Company regarding the operation of shock absorbers sent for testing. | 12th Jan 1937 | Box 152 \ 1 scan0233 | |
| Letter from Gordon Armstrong Patent Suspension regarding different readings from two shock absorbers. | 12th Jan 1937 | Box 152 \ 1 scan0234 | |
| Despatch note regarding two loaned Armstrong Shock Absorbers being sent to Gordan Armstrong Patent Suspension Co., Ltd. | 15th Jan 1937 | Box 152 \ 1 scan0235 | |
| Letter from Gordon Armstrong Patent Suspension Co. Ltd. regarding shock absorbers and hydraulic bellows. | 15th Jan 1937 | Box 152 \ 1 scan0236 | |
| Advice note from Armstrong's Patents Co. Ltd. for a hydraulic shock absorber. | 15th Jan 1937 | Box 152 \ 1 scan0237 | |
| Letter from a suspension company regarding the testing of spring-loaded valves and the development of two new shock absorber systems. | 21th Jan 1937 | Box 152 \ 1 scan0238 | |
| Letter from Gordon Armstrong to Mr. Leslie regarding shock absorber valve noise, casting materials, and spare parts. | 22th Jan 1937 | Box 152 \ 1 scan0239 | |
| Letter from Armstrong's Patents Co. Ltd. enclosing spare adjusting screw washers. | 22th Jan 1937 | Box 152 \ 1 scan0240 | |
| Advice note from Armstrong's Patents Co. Ltd. for the dispatch of S/A oil for testing. | 22th Jan 1933 | Box 152 \ 1 scan0241 | |
| Request to despatch various 25.HP rear shock absorber parts to Gordon Armstrong Esq. | 19th Jan 1937 | Box 152 \ 1 scan0242 | |
| Letter discussing ongoing testing, noise issues, and material choices for dampers and connecting links. | 21th Jan 1937 | Box 152 \ 1 scan0243 | |
| Letter detailing the correct procedure for blocking high-pressure drillings using threaded plugs. | 25th Jan 1937 | Box 152 \ 1 scan0244 | |
| Letter to Armstrong's Patents Co. discussing the choice of materials for special damper casings and plugs. | 25th Jan 1937 | Box 152 \ 1 scan0245 | |
| Letter from The Armstrong's Patents Co. Ltd. regarding shock absorber castings, valve assembly components, and other parts. | 26th Jan 1937 | Box 152 \ 1 scan0246 | |
| Letter to Armstrong's Patents Co. Ltd. clarifying the drawing diameter for a bronze HP valve sleeve to reduce noise. | 28th Jan 1937 | Box 152 \ 1 scan0247 | |
| Advice note from Armstrong's Patents Co. Ltd. for a pair of medium shock absorbers. | 1st Feb 1937 | Box 152 \ 1 scan0248 | |
| Correspondence from Armstrong's Patents Co. Ltd. regarding the diameter of an HF valve and a delay in dispatching shock absorbers. | 1st Feb 1937 | Box 152 \ 1 scan0249 | |
| Letter from the Anglo-American Oil Company regarding experimental oils for shock absorbers. | 3rd Feb 1937 | Box 152 \ 1 scan0250 | |
| Comparison of Redwood I Viscosity for Univis and Castrol 'F' oils at various temperatures. | 8th Feb 1937 | Box 152 \ 1 scan0251 | |
| Letter to Armstrong's Patents Co. Ltd. regarding valve cam operation, parts, and damper testing. | 8th Feb 1937 | Box 152 \ 1 scan0252 | |
| Letter from The Armstrong's Patents Co. Ltd. regarding the despatch of shock absorbers. | 10th Feb 1937 | Box 152 \ 1 scan0253 | |
| Advice note from Armstrong's Patents Co. Ltd. for a pair of rear shock absorbers. | 10th Feb 1937 | Box 152 \ 1 scan0254 | |
| Letter from Armstrong's Patents Co. Ltd. regarding the manufacture and dispatch of shock absorbers. | 16th Feb 1937 | Box 152 \ 1 scan0255 | |
| Letter from Armstrong's Patents Co. Ltd. regarding the dispatch and valve action of rear shock absorbers. | 19th Feb 1937 | Box 152 \ 1 scan0256 | |
| Advice note from Armstrong's Patents Co. Ltd. for a pair of rear shock absorbers of the Bellows type. | 19th Feb 1933 | Box 152 \ 1 scan0257 | |
| Telegram received by telephone regarding the bottom connection of a damper connecting link. | 22th Feb 1937 | Box 152 \ 1 scan0258 | |
| Letter to Armstrong's Patents Co. Ltd. regarding issues found during damper testing. | 3rd Mar 1937 | Box 152 \ 1 scan0259 | |
| Letter to Armstrong's Patents Co. Ltd. to reschedule a visit. | 4th Mar 1937 | Box 152 \ 1 scan0260 | |
| Letter to Armstrong's Patents Co., Ltd. regarding the design and fitting of dampers. | 18th Mar 1937 | Box 152 \ 1 scan0261 | |
| Letter requesting views on the fitting of two new valves. | 18th Mar 1937 | Box 152 \ 1 scan0262 | |
| Advice note from Armstrong's Patents Co. Ltd. for a pair of rear shock absorbers. | 18th Mar 1937 | Box 152 \ 1 scan0263 | |
| Letter from Armstrong's Patents Co. Ltd. concerning hand-controlled shock absorbers and a split crank. | 19th Mar 1937 | Box 152 \ 1 scan0264 | |
| Letter to Amal Ltd. requesting information, prices and samples for control ball joints and roller joints. | 22th Mar 1937 | Box 152 \ 1 scan0265 | |
| Letter from Gordon Armstrong Patent Suspension discussing a fault with shock absorbers and proposing a solution. | 22th Mar 1937 | Box 152 \ 1 scan0266 | |
| Letter from Gordon Armstrong Patent Suspension Co. Ltd. regarding the conversion of a pair of shock absorbers. | 22th Mar 1937 | Box 152 \ 1 scan0267 | |
| Cross-sectional drawing of a valve or actuator assembly featuring a bellows and return spring. | 25th Mar 1937 | Box 152 \ 1 scan0268 | |
| The despatch of a loaned Armstrong shock absorber. | 25th Mar 1937 | Box 152 \ 1 scan0269 | |
| Letter to Gordon Armstrong Patent Suspension Co. Ltd. discussing bellows control dampers. | 25th Mar 1937 | Box 152 \ 1 scan0270 | |
| Design modifications for a plunger and damper system based on sketch Rm.344. | 25th Mar 1937 | Box 152 \ 1 scan0271 | |
| Letter from Gordon Armstrong Patent Suspension Co. Ltd. to Mr. Leslie regarding a control issue and a proposed solution sketch. | 31th Mar 1937 | Box 152 \ 1 scan0272 | |
| Letter to Gordon Armstrong Patent Suspension Co. Ltd. arranging a meeting and discussing the need for a cross-shaft for hand control dampers. | 2nd Apr 1937 | Box 152 \ 1 scan0273 | |
| Letter from Gordon Armstrong Patent Suspension Company regarding a meeting to discuss shock absorbers and a recent discovery. | 5th Apr 1937 | Box 152 \ 1 scan0274 | |
| Return of two broken small coil springs and a small plunger for inspection. | 7th Apr 1937 | Box 152 \ 1 scan0275 | |
| Letter to Gordon Armstrong Patent Suspension Co. Ltd. regarding shock absorber valve spring failures and load specifications. | 7th Mar 1937 | Box 152 \ 1 scan0276 | |
| Page two of a letter following up on a recent visit. | 8th Apr 1937 | Box 152 \ 1 scan0277 | |
| Return of shock absorber valve plungers for examination. | 8th Apr 1937 | Box 152 \ 1 scan0278 | |
| Letter from Gordon Armstrong Patent Suspension regarding the supply of better, more substantial springs. | 8th Apr 1937 | Box 152 \ 1 scan0279 | |
| Letter to Gordon Armstrong Patent Suspension Co., Ltd. regarding a king-pin, bush, and damper shaft failure. | 9th Apr 1937 | Box 152 \ 1 scan0280 | |
| Letter to a suspension supplier regarding issues with dampers and valve guides for a Phantom III. | 9th Apr 1937 | Box 152 \ 1 scan0281 | |
| Telegram received by telephone requesting the dispatch of parts for a Bentley. | 9th Apr 1937 | Box 152 \ 1 scan0282 | |
| Letter from Gordon Armstrong Patent Suspension regarding shock absorber valve parts. | 12th Apr 1937 | Box 152 \ 1 scan0283 | |
| Letter from Gordon Armstrong Patent Suspension regarding a choked kingpin and bush. | 12th Apr 1937 | Box 152 \ 1 scan0284 | |
| Instruction and pricing leaflet for the Armstrong Super Hydraulic Shock Absorber. | 12th Apr 1937 | Box 152 \ 1 scan0285 | |
| Explanatory sheet for the Armstrong SUPER Hydraulic Shock Absorber, detailing its construction and working principles. | 12th Apr 1933 | Box 152 \ 1 scan0286 | |
| Advice note from Armstrong's Patents Co. Ltd. regarding complete valve assemblies for shock absorbers. | 12th Apr 1933 | Box 152 \ 1 scan0287 | |
| Letter to Gordon Armstrong Patent Suspension Co. regarding modifications to shock damper levers for a P.III. | 15th Apr 1937 | Box 152 \ 1 scan0288 | |
| Advice note from Armstrong's Patents Co. Ltd. regarding the dispatch of shock absorbers and valve components. | 15th Apr 1930 | Box 152 \ 1 scan0289 | |
| Advice note from Armstrong's Patents Co. Ltd. for a pair of balanced valves for the Experimental Department. | 13th Apr 1937 | Box 152 \ 1 scan0290 | |
| Advice note from Armstrong's Patents Co. Ltd. for a pair of shock absorbers and valve sleeves. | 16th Apr 1937 | Box 152 \ 1 scan0291 | |
| Letter from Gordon Armstrong Patent Suspension regarding special arms for a Phantom III model and casting patterns. | 19th Apr 1937 | Box 152 \ 1 scan0292 | |
| Letter to Gordon Armstrong Patent Suspension Co. regarding heavy control operation on a Phantom III and potential damper lever modifications. | 21th Apr 1937 | Box 152 \ 1 scan0293 | |
| The manufacture of 4 sets of valve parts for Armstrong Shock Dampers. | 21th Apr 1937 | Box 152 \ 1 scan0294 | |
| Letter from Gordon Armstrong Patent Suspension regarding the supply and sizing of shock absorbers for a Phantom III vehicle. | 22th Apr 1937 | Box 152 \ 1 scan0295 | |
| The return of loaned shock absorbers and spare valve mechanisms for modification. | 22th Apr 1937 | Box 152 \ 1 scan0296 | |
| Advice note from Armstrong's Patents Co. Ltd. for two complete valve assemblies for shock absorbers. | 22th Apr 1937 | Box 152 \ 1 scan0297 | |
| Telegram received by telephone regarding the return of dampers and balanced valves for modification. | 27th Apr 1937 | Box 152 \ 1 scan0298 | |
| Letter to Gordon Armstrong Patent Suspension Co. Ltd. regarding damper specifications for the Phantom III. | 23th Apr 1937 | Box 152 \ 1 scan0299 | |
| Letter discussing damper design principles, rig testing, and application for the Phantom III chassis. | 26th Apr 1937 | Box 152 \ 1 scan0300 | |
| Letter from Armstrong's Patents Co. Ltd. discussing proposed modifications to shock absorber spindles. | 26th Apr 1937 | Box 152 \ 1 scan0301 | |
| Cross-sectional engineering drawing of a mechanical component featuring a bronze bush and various taper specifications. | 26th Apr 1937 | Box 152 \ 1 scan0302 | |
| Letter from Gordon Armstrong Patent Suspension discussing the design and production of dampers for the Phantom III. | 26th Apr 1937 | Box 152 \ 1 scan0303 | |
| Letter discussing hand-controlled shock absorbers for a Bentley, including a sketch of a spring-loaded valve mechanism. | 26th Apr 1937 | Box 152 \ 1 scan0304 | |
| Letter from the Experimental Department to Gordon Armstrong Patent Suspension Co. Ltd. regarding damper modifications. | 27th Apr 1937 | Box 152 \ 1 scan0305 | |
| Advice note from Armstrong's Patents Co. Ltd. detailing returned medium shock absorbers fitted with new parts. | 28th Apr 1937 | Box 152 \ 1 scan0306 | |
| Letter from Gordon Armstrong Patent Suspension Co. regarding alterations to a valve pattern and the return of shock absorbers. | 28th Apr 1937 | Box 152 \ 1 scan0307 | |
| Follow-up letter regarding the return of rear shock absorber parts sent on loan to G. Armstrong Esq. | 29th Apr 1937 | Box 152 \ 1 scan0308 | |
| Request to issue a covering order to Amal Ltd. for 7 sample ball and roller joints. | 1st May 1937 | Box 152 \ 1 scan0309 | |
| Drawing of a tube insert for an Armstrong Damper Casing. | 8th May 1932 | Box 152 \ 1 scan0310 | |
| Advice note from Armstrong's Patents Co. Ltd. regarding patterns, coreboxes and insert tubes for castings. | 6th May 1937 | Box 152 \ 1 scan0311 | |
| Letter from Armstrong's Patents Co. Ltd. regarding the specification and completion of a pair of shock absorbers. | 6th May 1937 | Box 152 \ 1 scan0312 | |
| Despatch of a hand control damper to Armstrong's Patents Co.Ltd. for alterations. | 7th May 1937 | Box 152 \ 1 scan0313 | |
| Letter to Armstrong's Patents Co. Ltd. regarding the supply and testing of dampers, levers, and spindles for a Bentley. | 7th May 1937 | Box 152 \ 1 scan0314 | |
| Internal request to make 8 damper casing castings from Armstrong's patterns. | 8th May 1937 | Box 152 \ 1 scan0315 | |
| Letter from Gordon Armstrong Patent Suspension Company regarding shock absorber development and noise issues. | 10th May 1937 | Box 152 \ 1 scan0316 | |
| Letter from Armstrong's Patents Co. Ltd. regarding the return of a rectified shock absorber and enclosing drawings for Bentley and P3 models. | 10th May 1937 | Box 152 \ 1 scan0317 | |
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