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).
Advertising brochure for the Graham Electrical Autohorn.
| Identifier | ExFiles\Box 49\5\ Scan102 | |
| Date | 14th March 1921 guessed | |
| THE GRAHAM AUTOHORN. The Horizontal Position of the Diaphragm avoids Fouling or Deterioration by Accumulation of Dirt, Dust or Water. Patentees and Sole Manufacturers: ALFRED GRAHAM & COMPANY (E. {Mr Elliott - Chief Engineer} A. {Mr Adams} GRAHAM). Telegrams: Navalhada Brock London. St. {Capt. P. R. Strong} Andrew's Works CROFTON PARK LONDON, S. E. {Mr Elliott - Chief Engineer} 4. Telephones: Sydenham 366, 952 and 1700. Spottiswoode, Ballantyne & Co, Ltd., Printers, London, Colchester & Eton. THE GRAHAM AUTOHORN. The "GRAHAM" ELECTRICAL AUTOHORN. The WARNING SIGNAL of QUALITY and DISTINCTION. | ||