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).
Register tracking part modifications and their applicability to various chassis models, including issue dates.
| Identifier | ExFiles\Box 171\4\ img054 | |
| Date | 10th March 1931 | |
| Headers: X.No., Title, [Model Checkmarks], Chassis, Date, Sent for Cost. Row 1: X5280, Starter Carburetter & twin Inductor pipes, deleted., 25HP, 10-3-31, ✓ Row 2: X6020L, Aluminium Ignition Tubes., 25HP, 11-2-31, (Cancelled) Row 3: X5600., Revised Bonnet Cover. Ranging Call & one fastener., ✓ 25HP, 23-3-31 Row 4: X8020., Low inertia Spring Drive, ✓ 25HP, 10-3-31 Row 5: X5250., 25HP top tube with P indentation., 25HP, 24-2-31 Row 6: X7460. X8449, Reservoir for Oil Pumps., ✓ Phan I, 13-2-31 Row 7: X8806., Centralized Lubrication to, [blank], [blank] Row 8: X8420, Rear axle beam, 25HP, 6-3- | ||