dh83

The aircraft appears to be a de Havilland DH.83 Fox Moth. The aircraft was built in relatively small numbers prior to WWII (~100), and it can be presumed that a far smaller number than that were operated in Australia. Too bad we can't see what is written on the bottom of the lower port-side wing to complete "FLY WITH . . .", I'd imagine that may provide further clues as to the aircraft's operator and the airfield/airport this photo was taken at. See: en.wikipedia.org/wiki/De_Havilland_Fox_Moth

Mascot - Kingsford Smith Airport, ASSY

"Fly with me!" I recall seeing another photo of this plane a while ago

It looks more like a Genairco than a Fox Moth

Definitely a Fox Moth, the Genairco had different cabane struts and side windows.

On 15 May 1928, John Flynn's dream became a reality with the opening of the Australian Inland Mission Aerial Medical Service in Cloncurry, Queensland (later to be renamed the Royal Flying Doctor Service). From the first flight in a single engine, fabric covered bi-plane, the RFDS steadily grew in size, scope and reach. Over the next few years, the RFDS began to expand across the country: Source: www.flyingdoctor.org.au/about-the-rfds/history/rfds-secti...

Men in short trousers and long socks. Must be North Queensland!