Great stuff Feldy, thanks for taking the time to take the pictures.
Those pieces are Way better than ours, and I would love to see a proper photo of the game board, I am quite familiar with a lot of Australian geography and history.
My phone wouldn't allow for a legible photo of the board, but fortunately
that picture at least exists in the first page of a Google search so I'll post it here.
A few differences in that board to the one I've got
1. The Australian flag is not present on mine.
2. The Community Chest symbol is more detailed on mine (obviously this is an earlier edition in the picture).
3. Symbols for Perth Station, Telecoms Australia and Australia Post updated.
4. For some reason, my board has reverted to the more common, yet technically incorrect (in Australia) spelling of "Jail" rather than "Gaol".
But yeah, other than that, it's the same. This board probably didn't come with a Koala though, according to my box that piece was brand new with that edition.
Come to think of it, this could be a graphical reinterpretation of the board, made my some kid with Paint for all I know.