| Description | Date | Identifier | |
| Letter to Rolls-Royce of America regarding American alterations and standardisation sheets agreed by Mr. Royce. | 5th Sep 1923 | Box 81 \ 2 scan0051 | |
| Querying the procedure for issuing standardisation sheets related to American alterations. | 18th Sep 1923 | Box 81 \ 2 scan0052 | |
| Questioning the process for receiving designs for American alterations, specifically citing sheet metal clips. | 21th Sep 1923 | Box 81 \ 2 scan0053 | |
| Procedure and responsibility for American alterations, referencing previous reports. | 24th Sep 1923 | Box 81 \ 2 scan0054 | |
| Recommendation to test brake and change speed levers made from rustless steel and 25% nickel. | 24th Sep 1923 | Box 81 \ 2 scan0055 | |
| List of American alterations requiring instructions and tests before standardisation. | 25th Sep 1923 | Box 81 \ 2 scan0056 | |
| Comments on American alterations related to various vehicle components. | 26th Sep 1923 | Box 81 \ 2 scan0057 | |
| Recommendations on cancelling a brake spring bracket and fixing a water pump casing. | 26th Sep 1923 | Box 81 \ 2 scan0058 | |
| Outlining the procedure for handling and standardising alterations proposed by the American division. | 26th Sep 1923 | Box 81 \ 2 scan0059 | |
| Clarifying instructions to the Springfield plant regarding 'American Alterations' pending further tests and final approval. | 28th Sep 1923 | Box 81 \ 2 scan0060 | |
| Handling of alterations at the American plant in Springfield, advising to follow existing instructions. | 29th Sep 1923 | Box 81 \ 2 scan0061 | |
| Typed memorandum discussing the approval process for American alterations. | 1st Oct 1923 | Box 81 \ 2 scan0062 | |
| The testing and standardization process for alterations proposed by the American operations, including quotes from Mr. Royce. | 2nd Oct 1923 | Box 81 \ 2 scan0063 | |
| Which parts require a 10,000-mile test and coordinating standardization with the Springfield facility. | 2nd Oct 1923 | Box 81 \ 2 scan0064 | |
| Listing American alterations and their corresponding blueprint numbers. | 14th Oct 1923 | Box 81 \ 2 scan0065 | |
| American alterations and the necessity of a 10,000-mile test upon them. | 8th Oct 1923 | Box 81 \ 2 scan0066 | |
| The forwarding of American standardisation sheets and requesting confirmation if further tests are required. | 9th Oct 1923 | Box 81 \ 2 scan0067 | |
| Letter to Rolls-Royce of America regarding standardisation sheets for American alterations. | 9th Oct 1923 | Box 81 \ 2 scan0068 | |
| Letter to Rolls-Royce of America enclosing a list of initialled standardisation sheets for various components. | 4th Sep 1923 | Box 81 \ 2 scan0069 | |
| American alterations and confirming Mr. Royce's consent for a gearbox modification. | 24th Oct 1923 | Box 81 \ 2 scan0070 | |
| Proposal for the standardization of chassis parts, specifically to adopt Silchrome No.1 for exhaust and inlet valves. | 30th Oct 1923 | Box 81 \ 2 scan0071 | |
| Proposed standardization of chassis parts concerning the front engine guard. | 30th Oct 1923 | Box 81 \ 2 scan0072 | |
| Proposal to discontinue riveting on bolts in favour of lock washers, as per American Standardisation Sheet No. 22. | 31th Oct 1923 | Box 81 \ 2 scan0073 | |
| Use of Grover lock washers and riveting on chassis components. | 31th Oct 1923 | Box 81 \ 2 scan0074 | |
| American alteration to a valve stem based on a Standardisation Sheet from Springfield. | 2nd Nov 1923 | Box 81 \ 2 scan0075 | |
| American Standardisation Sheet No. 25 concerning the thickening of Gudgeon Pins. | 14th Nov 1923 | Box 81 \ 2 scan0076 | |
| Proposal to revert to an earlier gudgeon pin lock screw design due to post-war failures. | 1st Nov 1923 | Box 81 \ 2 scan0077 | |
| Increased stiffness of pin E-17765 to prevent it from spreading and hammering loose. | 1st Nov 1925 | Box 81 \ 2 scan0078 | |
| Proposed standardization of chassis parts concerning an alteration to the Gudgeon Pin. | 1st Nov 1925 | Box 81 \ 2 scan0079 | |
| The return of four signed American Standardisation Sheets to America. | 20th Nov 1923 | Box 81 \ 2 scan0080 | |
| Approval of standardisation sheets for 40/50 American Alterations to be used on Derby made cars. | 21th Nov 1923 | Box 81 \ 2 scan0081 | |
| Approval and implementation of American Standardisation Sheets Nos. 17, 22, 23, and 24. | 30th Nov 1923 | Box 81 \ 2 scan0082 | |
| Standardisation Sheet No. 24 and associated communication to avoid cabling America. | 30th Nov 1923 | Box 81 \ 2 scan0083 | |
| Letter from the Springfield plant to Derby discussing piston pin performance and knocking issues. | 10th Dec 1923 | Box 81 \ 2 scan0084 | |
| Analysis of piston pin wear and rattling issues, with a proposed design alteration to prevent distortion and knocking. | 10th Dec 1923 | Box 81 \ 2 scan0085 | |
| Sketches illustrating rubbing marks and distortion on a cylindrical component. | 1st Dec 1923 | Box 81 \ 2 scan0086 | |
| Selecting American alterations that do not require a 10,000-mile test. | 1st Dec 1923 | Box 81 \ 2 scan0087 | |
| List of American alterations with corresponding reference numbers. | 6th Dec 1923 | Box 81 \ 2 scan0088 | |
| Bakelite Nuts on Control Levers. | 10th Dec 1923 | Box 81 \ 2 scan0089 | |
| Agreeing to process a list of American alterations without issuing formal standardisation sheets. | 10th Dec 1923 | Box 81 \ 2 scan0090 | |
| Letter to Rolls-Royce of America regarding a list of approved alterations for cars. | 12th Dec 1923 | Box 81 \ 2 scan0091 | |
| List of alterations for cars in America. | 14th Dec 1923 | Box 81 \ 2 scan0092 | |
| Requesting comments on American Standardisation Sheets Nos. 17, 22, 23, and 24. | 14th Dec 1923 | Box 81 \ 2 scan0093 | |
| Proposal sheet for an alteration to the Epicyclic Gear on the 2nd Motion Shaft. | 1st Jan 1924 | Box 81 \ 2 scan0094 | |
| Proposal sheet regarding the epicyclic gear on the 2nd motion shaft, suggesting the omission of a bush and substitution of a guide. | 11th Jan 1924 | Box 81 \ 2 scan0095 | |
| Proposal to cancel bush G-3518 and reduce the bore of the sun wheel shaft for the epicyclic gear. | 11th Jan 1924 | Box 81 \ 2 scan0096 | |
| Proposal Sheet No. 27 for seals on carburetter adjustment, proposing an alteration for the 1st of March. | 25th Jan 1924 | Box 81 \ 2 scan0097 | |
| List of R.R. screw thread specifications, their dimensions, and standardization notes. | 22th Feb 1924 | Box 81 \ 2 scan0098 | |
| Proposal to seal carburettor jets to prevent owner tampering based on service experience. | 11th Jan 1924 | Box 81 \ 2 scan0099 | |
| Proposed standardization to fit lead seals on carburetter adjustments to prevent tampering. | 11th Jan 1924 | Box 81 \ 2 scan0100 | |
| Drawing for a lead seal with the Rolls-Royce monogram. | 11th Jun 1923 | Box 81 \ 2 scan0101 | |
| Distributing Proposal Sheet No. 26 concerning the lubrication of the clutch trunnion, received from America, and asking for approval of the alteration. | 25th Jan 1924 | Box 81 \ 2 scan0102 | |
| Proposal sheet regarding a modification to the lubrication of the clutch trunnion. | 11th Jan 1924 | Box 81 \ 2 scan0103 | |
| Proposed standardization of the clutch mechanism, replacing a trunnion screw and deleting an oil hole. | 11th Jan 1924 | Box 81 \ 2 scan0104 | |
| Blueprint for a Screw with dimensions and material specifications. | 18th Apr 1922 | Box 81 \ 2 scan0105 | |
| Engineering drawing of a Trunnion Screw for a 40/50 model. | 23th Nov 1923 | Box 81 \ 2 scan0106 | |
| Requesting an update on the present position of experimental schemes for an American Standardisation Sheet. | 29th Jan 1924 | Box 81 \ 2 scan0107 | |
| American Proposal Standardisation Sheets for clutch, carburetter, and gear components. | 12th Feb 1924 | Box 81 \ 2 scan0108 | |
| Status of American Standardisation Sheet No. 25, concerning the thickening of Gudgeon Pins. | 19th Feb 1924 | Box 81 \ 2 scan0109 | |
| Progress update on the thickening of gudgeon pins. | 2nd Feb 1924 | Box 81 \ 2 scan0110 | |
| American Proposal Sheets 26, 27 & 28, including a notation from Mr. Royce. | 23th Feb 1924 | Box 81 \ 2 scan0111 | |
| American Proposal Sheets 26, 27 & 28, agreeing to alterations and cancelling a 10,000 miles test. | 29th Feb 1924 | Box 81 \ 2 scan0112 | |
| The status of an alteration for American Standardisation Sheet No. 25. | 1st Mar 1924 | Box 81 \ 2 scan0113 | |
| Seeking an opinion on the necessity of a 10,000-mile test for modifications related to American Standardisation Sheets. | 28th Mar 1924 | Box 81 \ 2 scan0114 | |
| American Standardisation Sheets, waiving a 10,000-mile test and returning various sheets. | 1st Apr 1924 | Box 81 \ 2 scan0115 | |
| Proposals for American gearbox alterations, specifically regarding vibrations and the strengthening of the gear box. | 4th Apr 1924 | Box 81 \ 2 scan0116 | |
| Adopting American gear manufacturing practices at the Derby factory. | 1st Apr 1924 | Box 81 \ 2 scan0117 | |
| American Proposal Sheet No. 30 concerning the manufacture of Ground Continuous Gears. | 10th Mar 1924 | Box 81 \ 2 scan0118 | |
| Proposal sheet regarding the production of ground continuous gears to reduce noise and eliminate the use of abrasives. | 22th Feb 1924 | Box 81 \ 2 scan0119 | |
| Proposed standardization of chassis parts to use ground straight pitch gears for the constant mesh pinion and gear. | 22th Feb 1924 | Box 81 \ 2 scan0120 | |
| Proposal Sheet No. 29 for a change to the gear box. | 10th Mar 1924 | Box 81 \ 2 scan0121 | |
| Proposal to modify the change gear box by adding cross-webs to silence the 'growl' from the reverse gear. | 22th Feb 1924 | Box 81 \ 2 scan0122 | |
| Proposed alteration to the change gear box to make the reverse quieter by casting external cross-webs. | 22th Feb 1924 | Box 81 \ 2 scan0123 | |
| American Standardisation Sheet No. 31 concerning Piston Bedding. | 11th Mar 1924 | Box 81 \ 2 scan0124 | |
| Proposal sheet No. 51 detailing adjustments to piston bedding to address engine knocking. | 22th Feb 1924 | Box 81 \ 2 scan0125 | |
| Proposed standardization of a chassis part, specifically the Piston, to modify its bedding. | 22th Feb 1924 | Box 81 \ 2 scan0126 | |
| Eccentric adjustment of a magneto pinion, referencing American Standardisation Sheet No. 32. | 11th Mar 1924 | Box 81 \ 2 scan0127 | |
| Proposal sheet regarding an eccentric adjustment for the magneto pinion to address backlash and rattling issues. | 22th Feb 1924 | Box 81 \ 2 scan0128 | |
| Proposed standardization of a magneto drive bearing eccentric sleeve for chassis parts. | 22th Feb 1924 | Box 81 \ 2 scan0129 | |
| American Standardisation Sheet No. 33 for a Fiber Pedal Pad. | 11th Mar 1924 | Box 81 \ 2 scan0130 | |
| Proposal to fit a fiber pedal pad to prevent heat transfer from the engine to the driver's foot. | 22th Feb 1924 | Box 81 \ 2 scan0131 | |
| Proposed standardization to replace the steel accelerator pedal pad with a fiber one to prevent heat transfer to the driver's foot. | 22th Feb 1924 | Box 81 \ 2 scan0132 | |
| American Standardisation Sheet No. 34 for a radiator-to-pump water connection. | 11th Mar 1924 | Box 81 \ 2 scan0133 | |
| Proposal sheet regarding the water connection between the radiator and pump, addressing an issue causing leaks. | 22th Feb 1924 | Box 81 \ 2 scan0134 | |
| Proposed standardization of a chassis part, the water connection from the radiator to the pump. | 22th Feb 1924 | Box 81 \ 2 scan0135 | |
| American Standardisation Sheet No. 35 for steel washers in the rear axle case. | 11th Mar 1924 | Box 81 \ 2 scan0136 | |
| Proposal sheet to use steel washers below bolts in the rear axle case to prevent them from loosening and crushing the aluminum. | 22th Feb 1924 | Box 81 \ 2 scan0137 | |
| Proposed standardization to fit steel washers in the rear axle to prevent bolt heads crushing into aluminum. | 22th Feb 1924 | Box 81 \ 2 scan0138 | |
| Proposed immediate implementation of American Standardisation Sheet No. 36 for a Con. Rod Bolt. | 11th Mar 1924 | Box 81 \ 2 scan0139 | |
| Proposal to modify the con/rod bolt design due to a material shortage in forging. | 22th Feb 1924 | Box 81 \ 2 scan0140 | |
| Proposed standardization to modify the connecting rod bolt and corresponding milling. | 22th Feb 1924 | Box 81 \ 2 scan0141 | |
| American Standardisation Sheet No. 37, concerning the lubrication of intermediate camshaft bearings. | 11th May 1924 | Box 81 \ 2 scan0142 | |
| Proposal to modify the lubrication of intermediate camshaft bearings to prevent squeaking on new cars. | 22th Feb 1924 | Box 81 \ 2 scan0143 | |
| Proposal to modify the 4 intermediate camshaft bearings to improve lubrication. | 22th Feb 1924 | Box 81 \ 2 scan0144 | |
| Standardisation Sheet No. 38 and the use of 'bone-grey' fiber. | 11th Mar 1924 | Box 81 \ 2 scan0145 | |
| Proposal sheet to use 'bone-grey' fiber instead of red fiber for slipper fly-wheels. | 22th Feb 1924 | Box 81 \ 2 scan0146 | |
| Proposal to standardize chassis parts by substituting bone-grey fiber for red fiber washers on the slipper flywheel. | 22th Feb 1924 | Box 81 \ 2 scan0147 | |
| Cover memo requesting approval for a proposal concerning Standardisation Sheet No. 39 on screw threads. | 11th Mar 1924 | Box 81 \ 2 scan0148 | |
| Letter discussing the proposed simplification of screw threads and comparing S.A.E. and R.R. standards. | 22th Feb 1924 | Box 81 \ 2 scan0149 | |
| Proposal and list for standardizing screw threads to the U.S. standard form. | 28th Feb 1924 | Box 81 \ 2 scan0150 | |
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