The Buttons and the Chronograph Function
If you look very closely at the reset button at around 20 minutes, you will see some wear on the upper surface of the button. It interestingly appears only on the reset button and it is really only WISible for us :-) But the play of the reset button is obviously a tad less, so the button surface touches the underside of the bezel while being depressed. As I said, a normal user will not even notice that, so I do not think that is a big disadvantage. It just reflects the tolerances used in today's robot watch fabrication and assembly. And of course, one has to see this always in regard to the price of the watch. One would of course not accept this on an IWC, but that one costs about 20 times more.