During the middle of the afternoon, the Orion then departed Longreach for RAAF Base Williamtown in New South Wales as "Striker 05".
The "Striker" callsign suggests that it may be from 10 Squadron based at RAAF Base Edinburgh, South Australia.
UPDATE! The following photo posted on the Qantas Founders Museum Facebook page would suggest that the Orion was A9-751.
Eagle-eyed readers will note the last three digits of the Orion's serial number painting inside the front-wheel gear door - '751'.
Photo taken by 'AC' ©