My misunderstanding then. Thanks for correcting. As far as I remember- you always was OK about 21j.
I have few Chronos with 21j, and most of them works well, BUT!! as I said - I don't wear 'em often. So, don't know. And who need chrono anyway? I'm not a sprinter.
Now I prefer simplier watches, like YM, PAM, etc.
I definitely should open my YM, I have strong suspicion that some drunk chinese worker put swiss ETA in it, it works too good to be chinese mov't. Or they started to make it better than swiss?