The Kenwood Major 706 was manufactured from 1958 to 1963.
It was manufactured by Kenwood, Woking, Surrey.
The value is not great but would suggest that a machine in good condition could fetch around £200-£300. There is a company in Bridgwater, Somerset, that will refurbish/restore these machines. Look at their web site:
http://kenwoodchefrestore.co.uk/
Hope this helps.
David Moore
October 2010