Prior to federation in 1901 and following British military withdrawal in the 1860-1870s, each of the Australia colonies was responsible for providing their own military garrisons. This uniform is an example of one that would’ve been worn by a gunner in the NSW Artillery, either the permanent batteries or one of the many volunteer batteries. The uniform is an example of a field frock worn for non-ceremonial functions. the brass buttons would indicate that it belonged to a member of the permanent artillery, however, there are many exceptions to this rule.