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, Binduli Triangle 22nd August 2010.