| Description | Date | Identifier | |
| Letter from Wilmot-Breeden Ltd discussing production considerations for a sample bumper. | 19th Dec 1939 | Box 118 \ 3 scan0161 | |
| Letter from Wilmot-Breeden Ltd. providing design feedback on attaching a spring to a bar. | 21th Dec 1939 | Box 118 \ 3 scan0162 | |
| Letter to Messrs. Wilmot-Breeden Ltd. requesting a drawing of a bumper bar for approval. | 21th Dec 1939 | Box 118 \ 3 scan0163 | |
| Letter to Mr. R.P. Turner of Wilmot-Breeden Ltd. regarding a bumper bar. | 21th Dec 1939 | Box 118 \ 3 scan0164 | |
| Letter from Wilmot-Breeden Ltd regarding a delayed letter and a forthcoming drawing. | 28th Dec 1939 | Box 118 \ 3 scan0165 | |
| Letter from Wilmot-Breeden Ltd. discussing bumper design recommendations and enclosing blueprint PDEXP.6178. | 1st Jan 1940 | Box 118 \ 3 scan0166 | |
| The 'Ripplet front Bumper', comparing the Wilmot-Breeden design with an in-house scheme. | 9th Jan 1940 | Box 118 \ 3 scan0167 | |
| Letter to Messrs. Wilmot-Breeden Ltd. approving a bumper bar drawing with the exception of the bolt heads. | 10th Jan 1940 | Box 118 \ 3 scan0168 | |
| Letter from Wilmot-Breeden Ltd. acknowledging a request and arranging for Beetle Bolts and a sample pair of Bumpers. | 15th Jan 1940 | Box 118 \ 3 scan0169 | |
| Letter from Wilmot-Breeden Ltd. clarifying the design of sample bars following a telephonic conversation. | 18th Jan 1940 | Box 118 \ 3 scan0170 | |
| Note concerning bumper bars and body hardware from Wilmot-Breeden Ltd. | 14th Feb 1940 | Box 118 \ 3 scan0171 | |
| To C.H. Breeden regarding bumper bars, hydraulic torque converter and body hardware. | 17th Feb 1940 | Box 118 \ 3 scan0172 | |
| Correspondence from Wilmot-Breeden Ltd regarding two hand-made special sample front bumpers. | 28th Feb 1940 | Box 118 \ 3 scan0173 | |
| Letter concerning the supply of oil cooler elements and the design of a bumper bar. | 4th Mar 1940 | Box 118 \ 3 scan0174 | |
| Page 2 of a letter to C.L. Breeden regarding the finish of a hand-produced sample versus a mass-produced article. | 4th Mar 1940 | Box 118 \ 3 scan0175 | |
| Letter from Wilmot-Breeden Ltd discussing issues with a bumper bar sample and enquiring about a Harrison oil cooler. | 7th Mar 1940 | Box 118 \ 3 scan0176 | |
| Letter from Wilmot-Breeden Ltd. discussing the design and construction of special sample front bumpers. | 7th Mar 1940 | Box 118 \ 3 scan0177 | |
| Requesting information about the motif used on the centre of bumper bars. | 7th Mar 1940 | Box 118 \ 3 scan0178 | |
| Letter from Wilmot-Breeden Ltd concerning the design and production of special sample front bumpers. | 9th Mar 1940 | Box 118 \ 3 scan0179 | |
| Cover note from Rm to Ev regarding a copy of Breeden's latest drawings and the company's reply. | 11th Mar 1940 | Box 118 \ 3 scan0180 | |
| Letter from Wilmot-Breeden Ltd. regarding special sample front bumpers and their associated blueprints. | 9th Mar 1940 | Box 118 \ 3 scan0181 | |
| Letter to Wilmot-Breeden Ltd. regarding the design and finish of bumper components for Rolls-Royce and Bentley cars. | 11th Mar 1940 | Box 118 \ 3 scan0182 | |
| The supply and historical fitting of 'R-R' bumper motifs. | 11th Mar 1940 | Box 118 \ 3 scan0183 | |
| To stores confirming the receipt of one bumper motif by post. | 13th Mar 1940 | Box 118 \ 3 scan0184 | |
| Brief memo acknowledging the receipt of a bumper motif. | 13th Mar 1940 | Box 118 \ 3 scan0185 | |
| Letter to Wilmot Breedon Ltd. regarding a motif for a V-shaped bumper bar. | 13th Mar 1940 | Box 118 \ 3 scan0186 | |
| Letter from Wilmot-Breeden Ltd. discussing a drawing for a component featuring a central badge. | 18th Mar 1940 | Box 118 \ 3 scan0187 | |
| Design for a starting handle and front bumper brackets for the Ripplet 2.R.2 model. | 19th Mar 1940 | Box 118 \ 3 scan0188 | |
| Letter from Wilmot-Breeden Ltd. proposing a design for special front bumpers with an accompanying drawing. | 19th Mar 1940 | Box 118 \ 3 scan0189 | |
| Critique of a new bumper bar design from Wilmot Breedon, suggesting layout improvements. | 21th Mar 1940 | Box 118 \ 3 scan0190 | |
| Letter from Wilmot Breeden Ltd. detailing a proposal for special front bumpers and associated blueprint drawings. | 19th Mar 1940 | Box 118 \ 3 scan0191 | |
| Blueprint drawing of a front bumper, including details of the centre badge and over-rider. | 19th Mar 1940 | Box 118 \ 3 scan0192 | |
| Letter from supplier Wilmot-Breeden Ltd discussing the design and attachment method for bumpers and overriders. | 5th Apr 1940 | Box 118 \ 3 scan0193 | |
| Letter from C.H. Stephenson to W.A. Rowbotham enclosing a copy of a mislaid drawing. | 5th Apr 1940 | Box 118 \ 3 scan0194 | |
| Design and manufacture of a bumper bar with overriders and a central motif. | 9th Apr 1940 | Box 118 \ 3 scan0195 | |
| Letter to Messrs Wilmot Breedon Ltd. discussing hydrogen brazing tests and the design of bumper bar overriders. | 9th Apr 1940 | Box 118 \ 3 scan0196 | |
| Letter from Wilmot-Breeden Ltd. regarding experiments with copper-brazing bumper bar sections. | 18th Apr 1940 | Box 118 \ 3 scan0197 | |
| Instructions for the fitment of a front stabiliser to a LH Silver Phantom chassis. | 18th Apr 1940 | Box 118 \ 3 scan0198 | |
| Proposed front bumper design for the 'Myth' model and requesting a dimensional change. | 2nd Jul 1941 | Box 118 \ 3 scan0199 | |
| Letter to Wilmot-Breeden regarding the design of steering wheels and bumpers. | 16th Nov 1941 | Box 118 \ 3 scan0200 | |
| Improvements to the wheel nuts and discs for the Bentley 50. | 25th Aug 1938 | Box 118 \ 3 scan0201 | |
| Production status of a broaching fixture for Bentley Rear Hubs and a chamfering fixture for 25/30-HP pistons. | 31th Aug 1938 | Box 118 \ 3 scan0202 | |
| The results of a census of Bentley cars to count those fitted with discs. | 1st Sep 1938 | Box 118 \ 3 scan0203 | |
| The decision to stop fitting propellor shaft dampers on 4¼-litre Bentley cars. | 18th Jul 1938 | Box 118 \ 3 scan0204 | |
| Revised fits for needle bearings on Bentley propeller shafts. | 9th Dec 1937 | Box 118 \ 3 scan0205 | |
| Issues with a Bentley Propeller Shaft, including machining errors and hardness testing. | 24th Nov 1937 | Box 118 \ 3 scan0206 | |
| Part number change and Brinell testing for a Bentley propeller shaft pin. | 22th Nov 1937 | Box 118 \ 3 scan0207 | |
| Issues with propeller shaft needle bearings digging into pins due to being fitted too tightly. | 19th Nov 1937 | Box 118 \ 3 scan0208 | |
| Faulty spindle from a Bentley propellor shaft's rear mechanic joint. | 10th Aug 1937 | Box 118 \ 3 scan0209 | |
| Modification to the bumper stud design for easier replacement after a collision. | 26th Aug 1937 | Box 118 \ 3 scan0210 | |
| The design of Bentley Bumper Studs. | 26th Aug 1937 | Box 118 \ 3 scan0211 | |
| Modification to Bentley electrical wiring for accessibility when dismantling the front engine suspension. | 27th Aug 1937 | Box 118 \ 3 scan0212 | |
| Starting difficulties with 4¼-litre Bentleys and the recommendation of using thin oils. | 5th Jan 1938 | Box 118 \ 3 scan0213 | |
| Two test schemes for Breeden Stabilizer Bumpers on a 4¼ Litre Bentley Chassis. | 3rd Nov 1936 | Box 118 \ 3 scan0214 | |
| Design flaws, rattles, and friction issues with a bumper bar assembly. | 26th Aug 1936 | Box 118 \ 3 scan0215 | |
| Customer complaints regarding a rattling Wilmot-Breeden Bumper on a Bentley. | 18th Aug 1936 | Box 118 \ 3 scan0216 | |
| Proposal to fit and test improved bumper studs on a Bentley chassis experiencing failures. | 7th Aug 1936 | Box 118 \ 3 scan0217 | |
| Failures and potential improvements for Wilmot Breeden bumpers. | 26th Aug 1936 | Box 118 \ 3 scan0218 | |
| Inspection report on a Wraith II bump chassis front suspension after a 50-hour bump test. | 6th Apr 1937 | Box 119 \ 1 scan0001 | |
| Two photographs showing different views of a metal component, one labelled 'Near Side - Front' and the other 'Off Side - Rear'. | 6th Apr 1937 | Box 119 \ 1 scan0002 | |
| Instructions for fitting a Wraith Bumper Chassis with new suspension springs and a raised front engine mounting. | 6th Apr 1937 | Box 119 \ 1 scan0003 | |
| Failures on a Wraith Bumper Chassis after 50 hours of testing on drums. | 3rd Apr 1937 | Box 119 \ 1 scan0004 | |
| List of recommendations and required design alterations for various vehicle components. | 3rd Apr 1937 | Box 119 \ 1 scan0005 | |
| 25/30 HP spring, noting modifications and potential issues with its life expectancy. | 3rd Apr 1937 | Box 119 \ 1 scan0006 | |
| Photograph of a front suspension coil spring alongside a broken section of a spring. | 3rd Apr 1937 | Box 119 \ 1 scan0007 | |
| Photographic comparison of wear on shock damper connecting tube rubbers after different test durations. | 3rd Apr 1937 | Box 119 \ 1 scan0008 | |
| Photographic record of three different rubber components with part numbers and service life. | 3rd Apr 1937 | Box 119 \ 1 scan0010 | |
| Photograph of a radiator plate and bracket. | 3rd Apr 1937 | Box 119 \ 1 scan0011 | |
| Close-up photograph of an engine and its mounting bracket on the chassis. | 3rd Apr 1937 | Box 119 \ 1 scan0012 | |
| Photograph showing a broken side spare wheel bracket to frame. | 3rd Apr 1937 | Box 119 \ 1 scan0013 | |
| Photograph and time study for a petrol tank offside strap. | 3rd Apr 1937 | Box 119 \ 1 scan0014 | |
| Photographs showing the near side front and off side rear of a cracked component. | 13th Apr 1937 | Box 119 \ 1 scan0015 | |
| Request to fit a Bentley tank with cover plates and plugs onto the 'Bump' chassis. | 13th Apr 1937 | Box 119 \ 1 scan0016 | |
| Request to manufacture a petrol tank for a Wraith Bump chassis with specified modifications. | 15th Apr 1937 | Box 119 \ 1 scan0017 | |
| Instructions for fitting Woodhead springs and converting Phantom III damper links for the Wraith Bumper Chassis. | 21th Apr 1937 | Box 119 \ 1 scan0018 | |
| Internal work order for modifications and repairs to a Bentley Bumper Chassis. | 26th Apr 1937 | Box 119 \ 1 scan0019 | |
| Component failures on a Phantom III Bumper Chassis. | 27th Apr 1937 | Box 119 \ 1 scan0020 | |
| Photograph showing a broken Phantom III spare wheel carrier bracket after a bump test. | 12th Apr 1937 | Box 119 \ 1 scan0021 | |
| Photograph displaying various worn and sectioned metallic components, including brackets and a link. | 28th Apr 1937 | Box 119 \ 1 scan0022 | |
| Requesting the fitting of production front engine springs and new engine feet rubbers to a Bentley Bumper Chassis. | 28th Apr 1937 | Box 119 \ 1 scan0023 | |
| Request to fit production front springs and new engine feet rubbers to a Bentley Bumper Chassis. | 29th Apr 1937 | Box 119 \ 1 scan0024 | |
| Dismantling and crack testing of Phantom III Bumper Chassis aluminium front suspension housings. | 29th Apr 1937 | Box 119 \ 1 scan0025 | |
| Phantom III Bumper Chassis front suspension components after a 100-hour test. | 3rd May 1937 | Box 119 \ 1 scan0026 | |
| The condition and wear of a fulcrum pin, outer housing, and bushes in main lever rollers. | 3rd May 1937 | Box 119 \ 1 scan0027 | |
| Request for a new design to strengthen failed shock damper levers on a Wraith Bumper Chassis. | 4th May 1937 | Box 119 \ 1 scan0028 | |
| Photograph showing a fractured connecting link. | 4th May 1937 | Box 119 \ 1 scan0029 | |
| Photograph showing a failed connecting link after endurance testing. | 4th May 1937 | Box 119 \ 1 scan0030 | |
| Work to reduce knocking on the rear shock damper connecting tubes for a Wraith Bumper Chassis. | 4th May 1937 | Box 119 \ 1 scan0031 | |
| Requesting a modification to the rear damper attachment for the Wraith Bumper Chassis. | 5th May 1937 | Box 119 \ 1 scan0032 | |
| Test report on a welded rear crossmember for the Wraith Bumper Chassis after a 50-hour run. | 19th May 1937 | Box 119 \ 1 scan0033 | |
| Required repair work for a Phantom III Bumper Chassis. | 3rd Jun 1937 | Box 119 \ 1 scan0034 | |
| Instruction to fit a pair of the latest Armstrong Dampers to a Bentley Bumper Chassis. | 9th Jun 1937 | Box 119 \ 1 scan0035 | |
| Requesting the removal of a radiator matrix unit for testing and inspection of the soldering. | 18th Jun 1937 | Box 119 \ 1 scan0036 | |
| Requesting the fitting of rubber glands to the rear shock dampers on a Wraith bumper chassis. | 20th Jun 1937 | Box 119 \ 1 scan0037 | |
| Crack in the Wraith Bumper Chassis and the required modification to the damper support plate. | 21th Jun 1937 | Box 119 \ 1 scan0038 | |
| Instruction to fit a pair of Woodhead Springs to a Bentley Bumper Chassis. | 24th Jun 1937 | Box 119 \ 1 scan0039 | |
| Crack in the 2nd cross member of a Wraith Bumper Chassis and the proposed fix. | 30th Jun 1937 | Box 119 \ 1 scan0040 | |
| Close-up photograph of a vehicle's riveted and bolted chassis frame section. | 8th Jul 1937 | Box 119 \ 1 scan0041 | |
| Analysis of a crossmember fracture on the Wraith Bumper Chassis due to heavy loads from the roll bar. | 8th Jul 1937 | Box 119 \ 1 scan0042 | |
| Revised specification for a Bentley Bumper Chassis, detailing the dismantling and load re-setting of the rear shock dampers. | 18th Aug 1937 | Box 119 \ 1 scan0043 | |
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