Only the latter two were part of the Anglo Polish deal, the first two were from a previous deal, ten years earlier. Smith's Dock must have had three of these "larger" bulkers to build because they subcontracted one of them to Swans, KOPALNIA GOTTWALD, and she was built at Hebburn Dock.
See:
http://www.tynebuiltships.co.uk/K-Ships ... d1980.html