I didn’t think Qantas ever had any 100’s in their fleet…123 is definitely not a QF aircraft
B747-123 c/n 20108 was delivered to American Airlines as N9669 and was registered to QANTAS as VH-EEI on 8/2/1988.
It entered service with Air Pacific, still as VH-EEI, on 1/4/1988.