Hi Onetrack,
That DC-3 is VH-CWS of Classic Wings. Classic Wings operate charter and scenic flights from Perth Airport. The aircraft only started ops from Perth on 2 September.
One of their flights is a Perth City and Beaches scenic flight - this is probably what you saw it doing. See their website:
http://www.classicwings.com.au/flights.html
Here are photos of the aircraft:
http://www.airliners.net/search/phot...nct_entry=true
If you want specific info about any aircraft in Perth (Western Australia), I would recommend the following forum:
http://jetspotter.com/phpBB2/viewforum.php?f=4
Regards,
David
Perth, WA