Thanx for liking, guys!
Unfortunately, there's no record or source for that. I talked to many ex VNAF F-5 pilots but they have no clue. The reason for that is simple, pilots shared planes within the squadrons. They went on missions, came back and tried to live another day so they didn't really pay attention to the airplanes letter code or serial number, etc.... Some said the above belonged to 542nd FS, some said 522nd... so we may never know the truth, who's wrong and who's right