Longines HydroConquest

The Longines HydroConquest, reference L3.780.3.78.6, is a dive watch with a 39 mm round case in steel. The sunray grey dial has applied Arabic numerals and indexes and pink hands. The case measures 12.2 mm thick and 48.1 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 steel bracelet closes with a double safety folding clasp. The dial includes a date display and central seconds. The case has a unidirectional rotating ceramic bezel. A scratch-resistant sapphire crystal covers the dial, with several layers of anti-reflective coating on both sides.