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).
The Speedometer Drive, L.O.P. G.76750.
| Identifier | ExFiles\Box 169\1\ img024 | |
| Date | 13th June 1929 | |
| (5) RHC{R. H. Coverley - Production Engineer}/FW4/MS13.6.29. Speedometer Drive - L.O.P. G.76750. | ||