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).
Log sheet tracking component modifications and applicability for the 25 HP model.
| Identifier | ExFiles\Box 171\4\ img048 | |
| Date | 26th October 1931 | |
| X. NO. | TITLE | Mth R Wox Py EPDA E PNC Sg{Arthur F. Sidgreaves - MD} R Wot Ry Za By EP{G. Eric Platford - Chief Quality Engineer} E FRAC Je Hd{Mr Hayward/Mr Huddy} Mr Ex Pag 5150 | Water Pump and Cover combined cover and Bond | 25 HP | 26-10-31 5810 | New type N.2 Dunlops Road Wheels. | 25 HP | 20-11-31 5250 | Radiator dropped 4.096 in frame | 26 HP | 21-10-31 5370 | Ball bearing Cams for Servo. 45° angle | 25 HP | 13-1-32 5260 1085 | Flap type bonnet Ventilators | 25 HP | Sg{Arthur F. Sidgreaves - MD} 20-11-31 5520 | Hydraulic Dampers with split type pistons. | 25 HP | 20-11-31 5440 5290 | Style & front Engine fulcrums. | 25 HP | 2-2-32 | ||