WILLIAM HANSON, Tees Conservancy Commissioners, 107gt, Buoy Vessel,
built by Tees Conservancy Commissioners (presumably at their Graving Dock) 1897
1950 sold to E. W. Fielding, Leeds - 07/10/1952 sank in the Humber.
(details from Teesbuiltships.co.uk)
Photo contributed to Memories of Middlesbrough Facebook page by Peter Johnston: Ron