| Description | Date | Identifier | |
| Revised specification for Chassis 24-EX (Unit No. 23) detailing changes to the front and rear brakes. | 12th Sep 1930 | Box 169 \ 1 img097 | |
| Specification revision for Chassis 24-EX, Engine Unit No.28, regarding the front crossmember. | 20th Oct 1930 | Box 169 \ 1 img098 | |
| Revision to the specification for Unit No 23 (Chassis 24-EX), detailing changes to the Gear Box and Actuating Gear. | 19th Oct 1930 | Box 169 \ 1 img099 | |
| Revised specification for Chassis 24-EX, Unit No. 23, detailing changes to the front axle and brake components. | 10th Dec 1930 | Box 169 \ 1 img100 | |
| Specification revision for Engine Unit No. 25 (Chassis 24-EX), detailing crankshaft modifications. | 10th Dec 1930 | Box 169 \ 1 img101 | |
| Specification revisions for Chassis 24-EX (Unit No. 23), detailing changes to the exhaust fittings and servo motor mechanism. | 23th Dec 1930 | Box 169 \ 1 img102 | |
| Revised specification for Chassis 24-EX (Unit No. 25) regarding frames and fittings. | 14th Jan 1931 | Box 169 \ 1 img103 | |
| Specification revisions for L.H. Chassis 24-EX, unit number 23. | 28th Jan 1931 | Box 169 \ 1 img104 | |
| Specification revision for Unit No. 23 (Chassis 24-EX.L.H.), passed to test. | 28th Jan 1931 | Box 169 \ 1 img105 | |
| Revision to the specification for Engine Unit No. 23 concerning the crankshaft. | 10th Feb 1931 | Box 169 \ 1 img106 | |
| Revised specifications for L.H. Chassis 24-EX (Unit No. 23) frames and fittings. | 27th Feb 1931 | Box 169 \ 1 img107 | |
| Instructing to fit balance weights to the crankshaft of engine 24-EX. | 9th Mar 1931 | Box 169 \ 1 img108 | |
| Request to fit the bonnet to standard end clearance on vehicle 24-EX. | 7th May 1931 | Box 169 \ 1 img109 | |
| Requesting arrangements for foot brake linings and engine torque provisions for the 24-EX model. | 11th May 1931 | Box 169 \ 1 img110 | |
| Requesting to fit six balance weights to a crankshaft instead of the original twelve. | 15th May 1931 | Box 169 \ 1 img111 | |
| Specification revision for L.H. Chassis 24-EX, Unit No. 23, detailing changes to brakes, axles, and frame fittings. | 3rd Jul 1931 | Box 169 \ 1 img112 | |
| Specification revision for Unit No. 23 (Chassis 24-EX.L.H.), comparing previous and revised components. | 3rd Jul 1931 | Box 169 \ 1 img113 | |
| Specification sheet listing the components for Engine Unit No.23. | 16th May 1930 | Box 169 \ 1 img114 | |
| List of engine components cross-referenced to List of Parts (L.O.P.) document numbers. | 16th Jun 1930 | Box 169 \ 1 img115 | |
| List of parts and their corresponding List of Parts (L.O.P.) reference numbers. | 16th May 1930 | Box 169 \ 1 img116 | |
| Specification sheet for Chassis 26-EX, detailing incorporated parts and modifications. | 11th Jul 1930 | Box 169 \ 1 img117 | |
| List of specifications for various car components, including rear springs, steering column, petrol tank, and footboards. | 11th Jul 1930 | Box 169 \ 1 img118 | |
| List of modifications and specifications for various vehicle components. | 11th Jul 1930 | Box 169 \ 1 img119 | |
| List of parts and modifications with associated reference numbers and schemes. | 11th Jul 1930 | Box 169 \ 1 img120 | |
| Specification list of parts and modifications for various vehicle systems including axles, brakes, and lubrication. | 11th Jul 1930 | Box 169 \ 1 img121 | |
| List of parts and modifications for steering, wheel carrier, silencer, exhaust, and controls. | 11th Jul 1930 | Box 169 \ 1 img122 | |
| Specification sheet for Engine Unit No. 21 (Chassis 25-EX), detailing component parts and schemes. | 11th Jul 1930 | Box 169 \ 1 img123 | |
| List of engine components, modifications, and associated part numbers. | 11th Jul 1930 | Box 169 \ 1 img124 | |
| List of part modifications for various engine components, including wheelcase, water connections, oil fittings, and filters. | 11th Jul 1930 | Box 169 \ 1 img125 | |
| List of modifications and component updates for various vehicle systems including carburetter, gearbox, clutch and engine coupling. | 11th Jul 1930 | Box 169 \ 1 img126 | |
| List of part modifications and references for various vehicle mechanisms. | 11th Jul 1930 | Box 169 \ 1 img127 | |
| Electrical equipment specification for chassis 25-EX, engine unit number 22. | 8th Jul 1930 | Box 169 \ 1 img128 | |
| List of electrical components and their associated List of Parts (LOP) drawing numbers. | 11th Jul 1930 | Box 169 \ 1 img129 | |
| Revised specification for Engine Unit No. 21, Chassis 25-EX. | 15th Sep 1930 | Box 169 \ 1 img130 | |
| List of modifications and part updates for various vehicle components. | 15th Sep 1930 | Box 169 \ 1 img131 | |
| Specification revision for Chassis 25-EX (Engine Unit No. 21) detailing updates to various components. | 15th Sep 1930 | Box 169 \ 1 img132 | |
| List of modifications and adjustments for various vehicle components, page 2. | 15th Sep 1930 | Box 169 \ 1 img133 | |
| List of modifications concerning front axle dampers, a spindle, and a gearbox undersheet. | 15th Sep 1930 | Box 169 \ 1 img134 | |
| Revised specifications for Chassis AE-MX (Engine Unit No. A1). | 14th Oct 1930 | Box 169 \ 1 img135 | |
| List of modifications and revisions to various vehicle components. | 14th Oct 1930 | Box 169 \ 1 img136 | |
| Revised specifications for Engine Unit No. 21 (Chassis 2E-LX1). | 14th Oct 1930 | Box 169 \ 1 img137 | |
| Specifications for a Flywheel, Clutch, and Electrical switches. | 14th Oct 1930 | Box 169 \ 1 img138 | |
| Revisions to chassis 25-MX specification, including dispatch to the U.S.A. and component modifications. | 30th Oct 1930 | Box 169 \ 1 img139 | |
| Specification revisions for Engine Unit No. 21 (Chassis 26-EX) concerning carburettor and air intake arrangements. | 30th Oct 1930 | Box 169 \ 1 img140 | |
| Specification revision for Chassis 26-EX, detailing changes to frames, fittings, and road springs. | 5th Jan 1931 | Box 169 \ 1 img141 | |
| Inspection report for front axle dampers, rear shock dampers, and bonnet fasteners. | 5th Jan 1931 | Box 169 \ 1 img142 | |
| Revised specification for Engine Unit No.21 (Chassis 25-EX) regarding the starting carburetter. | 5th Jan 1931 | Box 169 \ 1 img143 | |
| Specification revision for Engine Unit No. 21 (L.M. Chassis 25-EX), detailing modifications to the clutch and flywheel. | 3rd Feb 1931 | Box 169 \ 1 img144 | |
| Specification revision for L.H. Chassis 25-EX, detailing changes to the front and rear axle dampers. | 3rd Feb 1931 | Box 169 \ 1 img145 | |
| Specification revision for L.H. Chassis 25-LX, detailing changes to the hubs, brakes, and axles. | 4th Feb 1931 | Box 169 \ 1 img146 | |
| Specification revision for Engine Unit No.21 (L.H. Chassis 25-EX), detailing changes to the flywheel and clutch assembly. | 4th Feb 1931 | Box 169 \ 1 img147 | |
| Specification revision for L.H. Chassis 25-EX, detailing changes to front and rear dampers and the fitting of new washers. | 19th Feb 1931 | Box 169 \ 1 img148 | |
| Specification revisions for Engine Unit No. 21, Chassis 25-EX, detailing changes to the flywheel, clutch, and servo mechanism. | 19th Feb 1931 | Box 169 \ 1 img149 | |
| Specification revision for L.H. Chassis 26-EX (Engine Unit No. 21), detailing changes to brakes, frame, and fittings. | 26th Feb 1931 | Box 169 \ 1 img150 | |
| Specification revision for L.H. Chassis 25-EX, detailing changes to the frames and fittings. | 28th Feb 1931 | Box 169 \ 1 img151 | |
| Specification revision for Engine Unit No. 21 (L.H. Chassis 25-EX), detailing changes to clutch and friction lining components. | 6th Mar 1931 | Box 169 \ 1 img152 | |
| Specification sheet for the springing system of a 25-EX model, detailing settings for front and rear springs, damper loads, and buffer clearances. | 7th Mar 1931 | Box 169 \ 1 img153 | |
| Specification revision for Engine Unit No. 21, detailing changes to the engine coupling. | 9th Mar 1931 | Box 169 \ 1 img154 | |
| Requesting to fit a rubber isolated steering box to car 25-EX. | 13th Apr 1931 | Box 169 \ 1 img155 | |
| Requesting modifications to the 25-EX car, including fitting a larger radiator tube and altering the front pivot lean. | 14th Apr 1931 | Box 169 \ 1 img156 | |
| Specification revision for L.H. Chassis 25-EX, Unit No 21. | 20th Apr 1931 | Box 169 \ 1 img157 | |
| Instructing to fit threaded spring shackles and erect the front engine feet with aluminium packing instead of rubber. | 24th Apr 1931 | Box 169 \ 1 img158 | |
| Specification revision for L.H. Chassis 25-EX (Engine Unit No. 21) comparing previous and revised fittings. | 4th May 1931 | Box 169 \ 1 img159 | |
| Requesting the fitting of Torque Reaction Dampers to the 25-EX model. | 4th May 1931 | Box 169 \ 1 img160 | |
| Postponing the fitting of threaded shackles to test torque reaction dampers and investigate a fan arrangement. | 4th May 1931 | Box 169 \ 1 img161 | |
| Specification revision for L.H. Chassis 25-EX concerning frames, fittings and a torque re-action damper scheme. | 7th May 1931 | Box 169 \ 1 img162 | |
| Specification sheet detailing shock damper loads, buffer clearances, spring poundage and vehicle weights for model 25-EX. | 2nd Mar 1931 | Box 169 \ 1 img163 | |
| Requesting modifications to a 25-EX chassis, including fitting a white-metal tail bearing and trialling a separate gearbox construction. | 2nd Mar 1931 | Box 169 \ 1 img164 | |
| Specification list of five alterations to be made to car chassis 25-EX. | 12th Mar 1931 | Box 169 \ 1 img165 | |
| Request to remove a specific coupling and clutch shaft, and to fit a new paper washer to the crankcase. | 12th May 1931 | Box 169 \ 1 img166 | |
| Requesting the fitting of angle brackets and the creation of tie-rods for testing purposes. | 14th May 1931 | Box 169 \ 1 img167 | |
| Requesting the re-fitting of a bonnet and installation of stronger bonnet clip springs. | 12th May 1931 | Box 169 \ 1 img168 | |
| Outlining six required modifications to chassis 25-EX before its dispatch to France. | 18th May 1931 | Box 169 \ 1 img169 | |
| Modifications and parts to be fitted to car 25-EX. | 28th May 1931 | Box 169 \ 1 img170 | |
| Requesting the removal of a centre subframe support and standardization of the subframe supports. | 28th May 1931 | Box 169 \ 1 img171 | |
| Request to build a 25-EX radiator using American tubes and a specific bottom tank. | 9th Jun 1931 | Box 169 \ 1 img172 | |
| From Hs/Les to RHC requesting the fitting of radiator cross-member F.82538. | 15th Jun 1931 | Box 169 \ 1 img173 | |
| The fitting of flim-flam shutters to the bonnet of the 25-EX car. | 15th Jun 1931 | Box 169 \ 1 img174 | |
| Cancelling instructions to fit a new rad crossmember and replacing a radiator bottom tank. | 15th Jun 1931 | Box 169 \ 1 img175 | |
| Request to arrange for the manufacture of two plates to be bench branded. | 19th Jun 1931 | Box 169 \ 1 img176 | |
| Revised specification for Chassis 25-EX (Unit No.21) following 10,000 miles trials. | 22th Jun 1931 | Box 169 \ 1 img177 | |
| Specification sheet detailing various vehicle components and their associated part numbers. | 22th Jun 1931 | Box 169 \ 1 img178 | |
| List of specifications and modifications for various chassis components. | 22th Jun 1931 | Box 169 \ 1 img179 | |
| List of specifications and modifications for exhaust, radiator, bonnet, and starting handle components. | 22th Jun 1931 | Box 169 \ 1 img180 | |
| List of modifications and part numbers for various chassis components, including undersheets, lever mechanisms, brakes, and axles. | 22th Jun 1931 | Box 169 \ 1 img181 | |
| List of modifications and specifications for various vehicle components and their corresponding reference numbers. | 22th Jun 1931 | Box 169 \ 1 img182 | |
| Revised specification for Engine Unit No. 21 (Chassis 25-EX). | 22th Jun 1931 | Box 169 \ 1 img183 | |
| List of engine component part numbers and modifications. | 22th Jun 1931 | Box 169 \ 1 img184 | |
| List of modifications and new details for various engine components and their associated part numbers. | 22th Jun 1931 | Box 169 \ 1 img185 | |
| List of vehicle components and their corresponding reference numbers and specifications. | 22th Jun 1931 | Box 169 \ 1 img186 | |
| Special die-pressed Ferodo friction linings for a geared servo motor mechanism. | 22th Jun 1931 | Box 169 \ 1 img187 | |
| Specification of electrical equipment for Chassis 25-EX, Unit No. 21. | 22th Jun 1931 | Box 169 \ 1 img188 | |
| List of electrical components and their corresponding 'List of Parts' references. | 22th Jun 1931 | Box 169 \ 1 img189 | |
| Request to fit a part in the rear engine feet and prepare a new set of pedals for chassis 25-EX. | 26th Oct 1931 | Box 169 \ 1 img190 | |
| Requesting an engine strip-down, inspection of dampers, and preparation of new camshafts for car 25-EX. | 26th Oct 1931 | Box 169 \ 1 img191 | |
| The inspection of engine wear on the 25-EX unit, specifically cylinder bores, a piston, and the nitr-alloy shaft. | 29th Oct 1931 | Box 169 \ 1 img192 | |
| Requesting the fitting of a flexible shackle to car 25-EX and the supply of correct springs. | 30th Oct 1931 | Box 169 \ 1 img193 | |
| Instruction to fit a rubber buffer on the dash to prevent bonnet knocks and test two new hard rubbers. | 3rd Nov 1931 | Box 169 \ 1 img194 | |
| Outlining the conditions required for testing pedals cantilevered from the frame. | 1st Nov 1931 | Box 169 \ 1 img195 | |
| Instructions to fit new brake linings and aluminium drums with cast iron liners to car 25-EX. | 1st Nov 1931 | Box 169 \ 1 img196 | |
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