From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
List of modifications and part numbers for various vehicle components.
| Identifier | ExFiles\Box 72\2\ scan0224 | |
| Date | 29th November 1926 | |
| -5- Front Brake Equalizing Mech: To L.O.P. G.74669. Front Axle & Brakes Modified Front Axle G.74920 to N.Scheme 2211-12. otherwise to L.O.P. G.74294. Cross Steering Tube To L.O.P. G.72392. Rear Axle Rear Axle with increased track No.EXP7.-B.909-15/52 ratio, fitted with - 1. Spring Brackets G.74550-1. 2. Brackets G.74712-3 to suit shorter Shock Damper Levers. 3. 90° angle serration Rear Spring Rollers & Plate G.74670-F.74822 otherwise to L.O.P. G.74002. Rear Hub To L.O.P. G.72937. Rear Brakes To L.O.P. G.74003 - to suit Rear Axle with increased track. Universal Joint To.L.O.P. G.6833. Undershields Gear Box Undersheet to suit lightened Front Axle to L.O.P. G.74991. New Side Engine Guards to L.O.P. E.74962. Flywheel & Clutch 1. Flywheel lightened in accordance with LeC 2259. 2. Clutch Operating Shaft lubrication to LeC 2264. 3. "Elmet" metal bush in accordance with (AJS1/M.22.7.26) BY/TWD{T. W. D???Aeith}3/CK.{Mr Clark} 17.6.26. 4. Parallel Bolts G.74957 in place of taper fitting otherwise to L.O.P. G.74416. Engine Coupling 1. Improved locking device for Fabric Coupling Bolts G.74916-7. | ||