Longines Ultra-Chron Carbon

The Longines Ultra-Chron Carbon, reference L2.839.4.52.2, has a 43 mm case. The watch is chronometer-certified. The case measures 14 mm thick and 48.9 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 dial, with several layers of anti-reflective coating on both sides. The anthracite dial has applied indexes and PVD grey polished hands. The dial includes central seconds. A black textile strap with a calf leather underside closes with a titanium buckle.