Title | Small Mines, Saleable Output Collieries Abandoned pre-1927; List of Colliery Companies: No.1 Area Pits Manpower 1947-1965; No.4 Area Pits, OMS 1947-1961; No.4 Area Pits, Manpower 1947-1961; No.4 Area Pits, Saleable Output 1947-1961; No.1 Area Workshops |