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).
Note on the ordering and specification of Ferranti Ammeters, including details on finishes, covers, and types.
| Identifier | ExFiles\Box 168\5\ img191 | |
| Date | 19th July 1930 | |
| 67E. X. 3498 19-7-30 J.D.79. X 3499 Ferranti Ammeters. The first Ferranti Ammeters nos 32352-6 were ordered to Drg no F75652 in our standard patel finish & supplied with metal covers. The covers were sent with the starters for production. The 20-25HP type instrument we have tested is of the glass fronted totally enclosed type. for the spread out instrument board. F.H. | ||