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).
Letter from Alfred Graham & Co. proposing a superior motor-driven warning horn for consideration, detailing its US production and sample delivery.
| Identifier | ExFiles\Box 49\5\ Scan115 | |
| Date | 30th December 1922 guessed | |
| Messrs. Rolls Royce Ltd., Careful examination and prolonged tests have proved to us that this Horn is infinitely superior electrically and mechanically to any other Motor Driven Warning Signal. In America its production averages nearly 3,000 per day, a higher figure than all other Electric Horn manufacturers put together can claim. Moreover, it is not a new device but one of 15 years standing which is being improved continually. These facts are mentioned to show you that no untested and unproved proposition is being offered. A sample Horn with the short flair trumpet, previously specified by your good-selves, is being prepared and will be despatched very shortly. If convenient, kindly test this and advise us of any alteration you may think desirable, as we are most anxious to fall in with the wishes of British Car Manufacturers as to finish etc. The test sample will be of American manufacture, but in January we hope to have the British made article in production. There will be no difference at all between these, other than finish, trumpet length or type where necessary. With compliments. Yours faithfully, ALFRED GRAHAM & Co. W. A. {Mr Adams} Graham SALES MANAGER | ||