Processional banner of Amalgamated Engineering Union, South Australian Branch, representing machinists, millwrights, smiths and patternmakers. Contains a different ornate emblem on either side, with fringe at bottom. One side reads, 'Amalgamated Engineering Union. United to Protect.' The reverse reads, 'South Australian Amalgamated Engineering Union Machinists Millwrights Smiths & Pattern Makers. Be United and Industrious.' At top is South Australian coat of arms with motto 'Advance Australia'.

Trades Union banners of the late 19th and early 20th centuries were carried in marches, initially during the 8 hour day campaign, and later to in Labor Day marches marking the workers struggle for rights in the workplace.