Longines Ultra-Chron

The Longines Ultra-Chron, reference L2.836.4.52.2, is a dive watch with a 43 mm case. The watch is chronometer-certified. The case is 13.9 mm thick and 49 mm lug-to-lug, with water resistance rated to 300 metres; the case has a screw-down crown. Self-winding calibre L836.6 provides up to 52 hours of power reserve and beats at 36,000 vibrations per hour. A scratch-resistant sapphire crystal covers the hour and minute display, with several layers of anti-reflective coating on both sides. The black dial carries applied indexes alongside polished silvered hands. A brown calf leather strap with a calf leather underside fastens with a pin buckle. Central seconds appears on the dial.