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T. W. Greenwell and Co, ship repairers, of South Docks, Sunderland
1901 Private company.
1914 Listed as Marine Engineers. 
1954 Sunderland Shipbuilding, Dry Dock and Engineering Co was established, made up of the Thompson, Laing and Crown yards and the repairer T. W. Greenwell and Co.
1961 Ship repairers. 400 employees.