Someone who owns both the gen & the chs rep recently posted a picture showing both watches side by side & the bezels look nearly identical. But if you see them both in person & know what to look for, you may be able to tell them apart. But this rep is so good that I have not even bothered to install a gen crown/tube, which I have sitting on my work table just for this watch. If/when the aftermarket crown/tube threads start having problems (they all do eventually), then I will install the gens. But this is truly the 1st rep in my experience that is accurate enough to leave as is. The only real give-away, if you have seen the gen in person, is the lack of AR beneath the cyclops (the gen crystals themselves are not AR'd). I have been thinking of trying to remove it (remove the movement, heat the crystal & use a razor blade to separate the plastic cyclops from the sapphire crystal), sending it out to be AR'd and then reattaching it (no idea what glue to use though). But since the potential for damage is greater than the amount of improvement an AR treatment would provide, I have chosen to leave it as is & just enjoy the watch in all of its glory for now.