HBW stands for Hollandse Beton- en Waterbouw or translated:
Dutch Concrete- and Waterworks.
The HBW used to be a group company of the HBG
The HBG and HBW no longer exist.....
Paul W.H. Voorhaar worked for HBW for a period of 1 1/2 years during the engineering, construction and installation of the concrete base of the offshore platform F3-FB-1P