No clue, tbh... but I WILL say I think you could harvest now and have a magnificent result... you'll get more cerebral effects without any amber (no couch lock) so it's going to depend on what you want from your smoke. If you really want more body relaxing effects, wait another week, maybe two .... you'll probably see some amber. I'd check DAILY - 'cause some strains happen to mature REALLY quickly when you think all is lost....
Good luck - nice NICE looking grow!