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).
Comparative blueprint of chassis frame cross-sections for Graham-8, RR-25HP, and Bentley models.
| Identifier | ExFiles\Box 126\1\ scan0181 | |
| Date | 3rd January 1935 guessed | |
| CROSS SECTION CENTRE OF CHASSIS FRAME. GRAHAM - 8. 7.6" .2" RAD .109" 2.4375 RR - 25 HP 6" .2" RAD .155" 2.4 BENTLEY. 7" .2" RAD .128 2. F.D. | ||