Longines HydroConquest

The Longines HydroConquest, reference L3.742.4.56.6, is a dive watch with a 41 mm round case in steel. The sunray black dial has applied Arabic numerals and indexes and polished silvered hands. The case measures 11.9 mm thick and 51.1 mm lug-to-lug, with water resistance rated to 300 metres; the case has a screw-down crown. Self-winding calibre L888.5 provides up to 72 hours of power reserve and beats at 25,200 vibrations per hour. A scratch-resistant sapphire crystal covers the dial, with several layers of anti-reflective coating on the underside. A steel bracelet closes with a double safety folding clasp. The case has a unidirectional rotating bezel. The dial includes a date display and central seconds.