The Blue Shark is Delma's ultimate diving watch. With its water resistance to 4000 m, it can go where only the adventurers have ever left. It is equipped with a helium valve that protects the watch from overpressure and is suitable for divers. The robust unidirectional bezel is another indicator that this is a clock, for deep sea divers. For excellent readability in the dark, the hands and indexes are richly equipped with luminosity.
