Longines Master Collection

The Longines Master Collection, reference L2.449.4.73.6, has a 30 mm round case in steel. The silver barleycorn dial carries applied Arabic numerals alongside blued steel hands. The case is 9.1 mm thick and 36.8 mm lug-to-lug, with water resistance rated to 30 metres. Self-winding calibre L592.5 provides up to 45 hours of power reserve and is visible through a transparent case back. A scratch-resistant sapphire crystal covers the hour and minute display, with several layers of anti-reflective coating on both sides. A steel bracelet fastens with a triple safety folding clasp and a push-piece opening mechanism with a fine adjustment system. A date display and central seconds appear on the dial.