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).
Standardisation sheet listing parts not yet fitted to production chassis for 20/25 HP & 40/50 HP models.
| Identifier | ExFiles\Box 154a\3\ scan0023 | |
| Date | 30th September 1931 | |
| X3066 BY/Mtn4/N.30.9.31. PARTS NOT YET FITTED TO PRODUCTION CHASSIS. 20/25 HP. & 40/50 HP. CHASSIS - STANDARDISATION SHEET. Date Issued | Stn.Sht. No. | Title | Date completed | Series where brought in. | Chassis to Test. 20/25HP. Chassis. 15.1.31 | X.5480 | Automatic oiling of Clutch Spigot from Gearbox. | 16.4.31 | 101 in 'T' | 29.4.31 | X.5000 | Increasing oil Capacity in engine sump to 1.25 galls, with a possible 1.5 gallons. | 14.7.31 | 101 in 'T' | 27.6.31 | X.7230 | Lengthened Rear Exhaust Pipe. | 8.9.31 | 101 in 'T'. | 40/50 HP. Chassis. 6.5.31 | X.7040 | Longer skirt piston. | 6.5.31 | 141 in 'N' | | | Improved luggage grid. | 5. 9.31 | When required. | 27.6.31 | X.7230 | Lengthened Rear Exhaust Pipe. | 8.9.31 | 'O' | | ||