Hydrosphere offers an original version of these masters of time. On the dial is a single needle for innovative diving instruments. Ingenious, Hydrosphere comes with an operation indicator at the base of the needle and a disc turning to the rhythm of the seconds. Also there is the vital unidirectional, ceramic rotating bezel with a double scale to ensure reading the time at different diving depths. It’s outfitted with a helium valve to release helium bubble that become trapped in the casing, thereby preserving its functional integrity during decompression.