WOB type iron ore waggon WOB 31395 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 325 for Koolyanobbing iron ore operations. This waggon was also converted to a WSM type ballast hopper by re-fitting the cut down top section and having bottom discharge doors fitted, converted back to WOB in 1997, and this is the first one to be repainted in ARG yellow and stands out against the newer style WOE type waggons as this empty train runs past the 628 km west of Bonnie Vale, 28th May 2006.