That could be it, as it ticks all the boxes for
International airport / serves capital / joint GA and military
I gave it a miss because all the control tower photos I could find did not match colour or pattern, or have flagpoles nearby.
Maybe it was painted recently.
I had been searching all the Garuda Citylink destination airports on google earth looking for a control tower match.
Only had 18 still to go
Bit of a waste of time really, when a major clue is not valid.