I have found five entries for Brisbane flights for 73/74 in my logbook.
They are;
13th May 1973 SVC10 G-ASGO SIN 12.42 BNE 20.05 BA722
23rd March 1974 SVC10 G-ASGL KUL 13.41 DRW 18.29 BA710
23rd March 1974 SVC10 G-ASGL DRW 19.12 BNE 22.35 BA710
27th March 1974 SVC10 G-ASGL BNE 06.03 DRW 10.00 BA737
27th March 1974 SVC10 G-ASGL DRW 10.48 SIN 15.08 BA737
Hope this helps.