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).
Blueprint showing a cross-section for a modification to a rocker part.
| Identifier | ExFiles\Box 96\2\ scan0235 | |
| Date | 3rd August 1932 | |
| RM.{William Robotham - Chief Engineer} 381. MODIFICATION TO ROCKER Pt.TTT DRILL .031 DIA. ALL OTHER DIMENSIONS TO E88760 NMTS 3-8-32 | ||