Minutes of general, special and committee meetings of the Powlett River (Wonthaggi) Branch (1911-1954), District Committee of Management (1913-1954) and Combined Unions of Carpenters, Engineers, Engine Drivers and Miners (1917-1948), union rules, correspondence, financial records, membership records for Powlett River and Altona branches (1918-1921), arbitration material and printed material. Also includes 1812 'overman's record', records of Hawdon Pit, Percy Main Colliery, and an envelope containing samples of coal.