This series consists of registered jacketed correspondence files which are arranged by a single number with an 'O' prefix, it is unknown what the 'O' stands for. The files in this series have been top numbered and the previous numbering system is the same as records in series SP1510/1 to SP1510/7.
The contents include statistics on labour reports, complaints, instructions, claims, appeals, registrations, meetings and general administrative matters.
Archives file number: RWS 78/6/1