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).
Cross-sectional drawing of a valve with its dimensions.
| Identifier | ExFiles\Box 151\2\ scan0087 | |
| Date | 28th July 1933 guessed | |
| SCALE 2.1 Hs. {Lord Ernest Hives - Chair} 1084 .525 .025 60° VALVE FOR Hs {Lord Ernest Hives - Chair} 1083. MADE FROM F59818 | ||