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).
'Zervo-Economizer' fitting, stating it is of no interest.
| Identifier | ExFiles\Box 76\3\ scan0136 | |
| Date | 23th September 1921 | |
| W/S Cx.{Major Len W. Cox - Advertising Manager} from Hs.{Lord Ernest Hives - Chair} *X919 Hs{Lord Ernest Hives - Chair}2/LG23. 9. 21. ZERVO-ECONOMIZER. With reference to the attached correspondence. We have no knowledge of this. From the description of the pamphlets, this fitting is not of any interest to us. Hs.{Lord Ernest Hives - Chair} | ||