The timeline for fitting a higher radiator and dashboard to the 12-EX car.
| Identifier | ExFiles\Box 17\3\ Scan303 | |
| Date | 20th July 1928 | |
| To Sg. {Arthur F. Sidgreaves - MD} from Hs. {Lord Ernest Hives - Chair} c. to BY. {R.W. Bailey - Chief Engineer} c. to DA {Bernard Day - Chassis Design} /EV. {Ivan Evernden - coachwork} Y7430 Hs {Lord Ernest Hives - Chair} 1/L620.7.28. PHANTOM. 'I' STEERING. Y7250 Y7430 Replying to Sg {Arthur F. Sidgreaves - MD} 11/M19.7.28. We anticipate it will be 4 or 5 weeks before we have 12-EX car fitted with the higher radiator and dashboard. Hs. {Lord Ernest Hives - Chair} | ||
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).