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 vehicle component modifications and their corresponding reference numbers.
| Identifier | ExFiles\Box 72\2\ scan0152 | |
| Date | 25th September 1925 | |
| -4- RHC{R. H. Coverley - Production Engineer}10/BE. 25.9.25. X.8330 - Hand Brake Equal: Mechn To L.O.P. G.2991. X.8330 - Foot Brake Equal: Mechn Short type to L.O.P. G.72695. X.8330 - Front Brake Equal: Mechn To L.O.P. G.73224. X.8420 - Front Axle. Modified Operating Shafts with larger Bearings & Lub: of Pivots to N.Sch: 1895-6. Front Brake Pull Rods to N.Sch: 1780. otherwise to L.O.P. G.72403. Lean of Pivot .175. X.8420 - Cross Steering Tube To L.O.P. G.72392. X.8350 - Rear Axle. No. 170 A x P. ( 15/52 ratio). X.8365 - Rear Hub Wheel Balancing Scheme to N.Sch: 2048 otherwise to L.O.P. G.72937. X.8360 - Rear Brakes. Metal Dirt Excluders on Rear Act: Shafts to G.L. 152. Improved Rear Brake Covers (Sch.I) to N.S.2039. X.8340 - Universal Joint To L.O.P. G.6833. X.8290 - Undershield. Felt Strip on Undershield to LeC 2091 otherwise to Arrgt. Drg. G.73499. X.8300 - Flywheel & Clutch Latest Lightened Clutch to LeC 2067. Simplified Clutch Stop to LeC 2080 otherwise to L.O.P. G.73748. -contd- | ||