Brand
Here in the United States that machine would have been made by Landers, Frary, and Clark. Whether it was imported to Australia or possibly made there under a different name altogether I do not know. For a time, that odd agitator was a signature of LFC, along with that very large, half-donut tub lip. I believe this agitator was used all the way into the late 30s by which time the Universal brand was using Apex built washing machines, possibly others too.