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of Coventry Street, Birmingham
1898 Simplex Steel Conduits company formed.
1901 Catalogue issued 
1903 Opened premises at 165a, West-George-street, Glasgow under the management of D. G. Brooks.
1905 the company moved to larger premises in Garrison Lane, Birmingham, which became the Head Office for a rapidly expanding network of factories and offices in London, Manchester, Glasgow, Liverpool, Leeds, Newcastle, Swansea and Bristol.
1905 Advert for wiring conduit. (The Simplex Steel Conduit Company of 80 Digbeth, Birmingham and 20 Bucklersbury, London EC).