The Australians would wear insignia on base or outside the base, but on patrol very rarely, a Brazzard (a piece of cloth the wrapped the upper arm) on the left shoulder, the Australian rising sun badge (yellow) under could be the single stripe for lance corporal, twin stripes for corporal, sergeant three stripes, staff sergeant three stripes and crown above, warrant officer crown.
Officers wore slide on rank insignia (slide onto the epaulettes) on both shoulders, sub lieutenant one pip, lieutenant two, captain three, major crown, lt colonel one pip crown, colonel two pips crown.
Cheers
Matt