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 drawing of a plunger component.
| Identifier | ExFiles\Box 15\5\ Scan291 | |
| Date | 9th May 1932 guessed | |
| Hs{Lord Ernest Hives - Chair} 604 MATERIAL S/ZN .598 DIA -1 .205 .100 .060 .410 .100 DIA FIT CASEHARDEN .010 - .015 DEEP WHERE MARKED H H SCALE 2/1 PLUNGER | ||