British Trolley Track Co

of Coburn Works, 25 Orange Street, London, SE1
1911 Business formed by E. A. Goddard in the basement of the Wrights Coal Tar Soap factory in Southwark Street.
1937 Manufacturers of the Coburn system of sliding doors.[1]
1968 Merged with E. Hill Aldam and Co to become Hillaldam Coburn