thanks for all your answers, after that, i searched wikipedia and learned whats the helium release valve for, also learned that some real-life diving watches are made so sturdy that no helium can enter inside them, as I guess this would be the case, if this were a usable diving watch
BTW constanwatch, I'm always compensating
I think it is a wonderful piece of engineering, and the fact that it won't go into production makes me want it even more, even though only as a rep, like for example in the case of the HW opus eleven, if somebody make the rep, he can count me in for one of those too.