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).
Notice about the fitting of a Ferranti ammeter to 14-G4.
| Identifier | ExFiles\Box 168\5\ img162 | |
| Date | 31th October 1929 | |
| X3498. 31.10.29. X. 3498. FERRANTI AMMETER. The Ferranti ammeter is now fitted to 14-G4. GJ. | ||