Wow, I'm loving this.
Overall, I'm not sure the mowhall has that much to add to the history itself, it seems others had already covered it's idea, such as the rotoscythe, and further, it was inconvenient to use, and overall flop.
However, it does still appear to be the first petrol powered rotary lawnmower built in Australia, and I do still find it very, very interesting.
I do wish I could find clearer photo's of it, it seems like such an interesting contraption, and while it does not seem to hold any major advances itself, it does mark a major milestone for Australia's mower history!