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Scottish Tube Co Ltd. of 34 Robertson Street, Glasgow.
1911 Scottish Tubemakers Ltd was formed to bring together most the Scottish tube makers
1912 Scottish Tube Co incorporated the following firms:
Stewarts and Lloyds held a number of shares in the new concern.
1914 Manufacturers of wrought iron and steel tubes for land and marine boilers, tubes for gas, water, steam and compressed air, oil line pipes, boring tubes; high pressure steam installations etc. 
1917 Advert for Wrought Iron and Steel Tubes. (Incorporating 10 works)
1919 Advert for Wrought Iron and Steel Tubes. (Incorporating 10 works)