Hello all
Moderator and NZ Historian Alan M has given us a great record for the
Masport Rotacut ...

https://www.outdoorking-forum.com.au/forum/ubbthreads.php/topics/92269/masport-rotacut.html#Post92269

This is the right time to raise the question:
It is clear that the North American Lawnboy influenced some AUS and
NZ lawnmowers. But was that influence direct or indirect.

Alan (link above) has clearly made the connection between Lawnboy and Masport's Rotacut.
My best guess, now, is that the NZ machine influenced the later AUS designs
that appeared here as Whirlwind Sabres, Pye-Tecnicos, and Qualcast Powa-matics.

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Jack