Federated Mining Mechanics' Association, then Colliery Mechanics' Mutual Protective Association, Hunter River District minutes (1908-1967, except 1927-1930 volume at Z586); Federated Mining Mechanics' and Surfacemen's Mutual Protective Association presscopy letterbook (1911-1920); Australasian Coal and Shale Employees' Federation rules, financial records, membership records for New South Wales Northern District (1916-1918), New South Wales Southern and Western Districts, Queensland, Victoria and Tasmania (1918), New South Wales Central District (1924-1930), and Captain's Flat lodge (1949), mining authorisations (1980, 1991), and printed material. Also includes 'pence books' of Barrier Branch of the Amalgamated Miners' Association (1911-1914) and photographs of Broken Hill dust-storm (1907), commemorative pennants and plaques for International Miners' Organisation conference (1987) and union neckties.

Convention minutes (1928-1965) and general and industrial files (1945-1989) of the Australasian Coal and Shale Employees' Federation, minutes of District Board of Management meetings (1967-1985), minutes of Queensland Colliery Employees' Union Board of Management (1981-1988), records of United Collieries and the Union Coal Mining Company Pty Ltd relating to Nymboida Colliery (1975-1981), records of the Colliery Mechanics Mutual Protective Association, Hunter River District (1911-1930), records of the Federated Mining Mechanics Association of Australasia (1923-1987), minutes of the Broken Hill Mine Mechanics Association (1977-1979) and records of the Muswellbrook/Singleton Branch of the Federated Engine Drivers' and Firemen's Association (1982-1988).

Membership and financial records, rule books, branch and sub-branch minutes (Southern Sub Branch and Federated Mining Mechanics and Surfacemen’s Mutual Protective Association, Lithgow Branch), industrial records, case files and transcripts. Includes records of predecessor the Colliery Mechanics Mutual Protective Association, Hunter River District.