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).
Parts request sent to Ferodo for four clutch discs with specific dimensions and tolerances.
| Identifier | ExFiles\Box 141\1\ scan0194 | |
| Date | 12th October 1936 | |
| X 1180 12.10.36. FERODO, CHAPEL-EN-LE-FRITH. PLEASE SEND FOUR CLUTCH DISCS 13.5 x 9.5 x .125 IN VM20 PARALLEL TO TWO THOUSANDTHS URGENT. SMITH, ROYCAR. | ||