100731 0253160 viewsWO type iron ore waggon WO 31291 is one of a batch of fifteen built by WAGR Midland Workshops between July and October 1968 with fleet number 170 for Koolyanobbing iron ore operations, with a 75 ton and 1018 ft³ capacity, on empty train 6418 at Binduli Triangle, 31st July 2010.