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).
From 'R' regarding a preference for a valve steel design from DES. 749.
| Identifier | WestWitteringFiles\R\October1927-December1927\ Scan130 | |
| Date | 5th December 1927 | |
| TO. FROM R.{Sir Henry Royce} C. to BJ. WOP. [strikethrough] By: HS.{Lord Ernest Hives - Chair} VALVE STEELS. Handwritten: X1688 / X2993 / X290 Handwritten: Y1474 / Y4587 Regarding DES. 749. sent with your RG{Mr Rowledge}6/LW21227., E.{Mr Elliott - Chief Engineer} and I prefer fig. 4. Cap with present standard when using softer valve steel. R.{Sir Henry Royce} | ||