There was one wagon in this class, OJ 229.
From workshops records, it appears the wagon went into Newport Workshops as _ON_ 229 on 7/3/1966 and was released as OJ 229 on 16/5/1966.
It went back to Newport Workshops on 8/5/1967 and was converted to _OC_ 229 on 5/7/1967.
Traffic is not known. From the code and diagram markings it may have been used as trial wagon for cement powder transport.
File c549m compiled by Peter J. Vincent, updated 3/3/2008