Longines HydroConquest GMT

The Longines HydroConquest GMT, reference L3.890.4.56.9, is a GMT watch with a 43 mm round case in steel. The sunray black dial carries applied indexes alongside polished silvered hands. The case is 12.9 mm thick and 52 mm lug-to-lug, with water resistance rated to 300 metres. Self-winding calibre L844.5 provides up to 72 hours of power reserve. A scratch-resistant sapphire crystal covers the hour and minute display, with several layers of anti-reflective coating on both sides. A black rubber strap with a synthetic lining fastens with a double security folding clasp with a micro adjustment system. A date display and central seconds appear on the dial.