WOB type iron ore waggon WOB 31379 is one of a batch of twenty five built by Comeng WA between 1974 and 1975 and converted from Mt Newman high sided waggons by WAGR Midland Workshops with a capacity of 67 tons with fleet number 304 for Koolyanobbing iron ore operations, the WAGR and Comeng builders plates are visible in the waggon sill, on loaded train 6413 at Binduli Triangle, 31st July 2010.