MWI which was near operational until a few weeks ago when it was srtipped, supposedly used to be run out of Moorabbin years ago for a company named "Jet Star" flying around rock-bands. Times have changed that's for sure.
It still has the outline of RFDS along the window tops of the fuselage, but never saw active service in the RFDS. Interestingly too, the rego is close to MWX which makes me wonder if it was somehow involved in the RFDS.