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).
Confirming that silicon bronze springs are now standard on all experimental cars.
| Identifier | ExFiles\Box 34\1\ Scan124 | |
| Date | 21th October 1919 | |
| X.2512. To EFC. from RHC.{R. H. Coverley - Production Engineer} RHC{R. H. Coverley - Production Engineer}5/LG21.10.19. X.3129. X.2522. SILICON BRONZE SPRINGS. This has been carried out on all experimental Cars and is now standard. RHC.{R. H. Coverley - Production Engineer} | ||