Here are a few of my varieties of Two Penny type two watermarks
This first image of a pair has a dot before the "A" of Australia, but the one on the right is more prominent, also the one on the right has a variety threw the left hand wattles.
This variety is a Dot between the T & W of two
The last variety has the "W" of two partially filled in and also a dot just below the figure of the two in the left hand value.