Patek Philippe

I have looked at this watch. Am I right, It only counts up to one minute. I do not see a thirty minute timer. I actually feel stupid asking this, but what is the point of a one minute chrono? Lots of raves, surely it has a thirty minute counter.

Like I wrote before : "Tachymeter , telemeter , pulsimeter : Patek Philippe has returned to the source of the chronograph by creating a multiple-scale instrument with a twist. It is not their first chronograph (or shall we say instrument) without sub dial...