WO type iron ore waggon WO 31269 is one of a batch of eighty six built by WAGR Midland Workshops between 1967 and March 1968 with fleet number 152 for Koolyanobbing iron ore operations, with a 75 ton and 1018 ft³ capacity, red-carded at West Kalgoorlie, 28th May 2006. This unit was converted to WOC for coal in 1986 till 1994 when it was re-classed back to WO.