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).
Price list and particulars for Thermionic Valves from the General Electric Co. Ltd.
| Identifier | ExFiles\Box 41\2\ Scan008 | |
| Date | 7th October 1919 | |
| To O.O. from EFC. EFC2/T7.10.19. X.3646 - RE THERMIONIC VALVE. Will you kindly write to the General Electric Co. Ltd., Osram Lamp Works, Hammersmith, London, W., for list of prices and particulars of the Thermionic Valves which we understand they are making. EFC. | ||