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).
Cancellation notice for experiment X.2925 on improved valve spring washers.
| Identifier | ExFiles\Box 36\1\ scan 123 | |
| Date | 24th August 1917 | |
| To EFC12/T24.8.17. X. 2925 - IMPROVED VALVE SPRING WASHERS TO LEC. 744. This experiment is now cancelled being superceeded by valves of the Peugeot Type under X.3147. E.F.C. EFC. | ||