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).
Request to fit six standard tungsten contact breaker levers with rubbing blocks of bone grey fibre.
| Identifier | ExFiles\Box 69\1\ scan0414 | |
| Date | 14th June 1927 | |
| Y4646 To RHC.{R. H. Coverley - Production Engineer} from EFC/HEW. EFC/HEW1/T14.6.27. Would you kindly have the six tungsten contact standard breaker levers herewith fitted with/rubbing blocks of bone grey fibre. We do not require springs. EFC/HEW. Finished | ||