Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 142,972 pages of information and 229,026 images on early companies, their products and the people who designed and built them.
of 66 Bridge Street, Manchester and Trafford Park, Manchester.
1913-1917 For a list of the models and prices of Petrol Motor Commercial Vehicles see the 1917 Red Book under the County name.
1915 made County
1919 Made the Duplex light car
1920 February. Motor Boat and Marine and Stationary Engine Exhibition. Showed Duplex sleeve valve engine 
1922 Continued to be listed
London agents were Blenheim Motor Co.