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Makers of Avometer, of Winder House, Douglas St, London SW.
1923 Private company formed.
Donald Macadie, a Post Office engineer, dissatisfied with having to carry many separate instruments, invented a meter that could measure Amps, Volts and Ohms - the multifunction meter was named AVO. Macadie took his idea to the Automatic Coil Winder and Electrical Equipment Co. The first AVO was put on sale in 1923, initially a DC-only instrument. Many of its features remained almost unaltered right through to the last AVO Model 8.
1957 Address: Avocet House, Vauxhall Bridge Rd, London.
1957 Became public company: Avo Ltd, of Avocet House, Vauxhall Bridge Rd, London, to manufacture instruments with the AVO trademark.
1961 Manufacturers of electrical, electronic and nucleonic measuring instruments and coil winding machines. 700 employees.