Just trying to put the other side across I mean, sure, if a21j movements weren't regulateable, then indeed, the 'swiss' movements would command the price difference. When I got my first Sub, that had a Swiss movement (confirmed by two sources) but it ran at +45 seconds a day, and at the time, I had no idea how to correct that timing. To be fair, most of the reps I buy with a21js come running at about +15 (give or take), I just like to tweak them as close to +/-0 as possible so I don't have to worry about adjusting the time on a daily basis, and think it's nice that they have that potential for reliability. Of course, if someone swaps their watches on a daily basis, and sets them each time they put them on, then that level of accuracy really isn't necessary, but if the watch is going to be worn day in, day out, I think it's good to have it running as accurately as possible