Longines Master Collection

The Longines Master Collection, reference L2.843.4.73.2, has a 38.5 mm round case in steel. The opaline ivory dial carries engraved Arabic numerals alongside blued steel hands. The case is 10.2 mm thick and 44.9 mm lug-to-lug, with water resistance rated to 30 metres. Self-winding calibre L893.5 provides up to 72 hours of power reserve and is visible through a transparent case back. A grey alligator leather strap with a calf leather underside fastens with a triple safety folding clasp and a push-piece opening mechanism. Small seconds appears on the dial. A scratch-resistant sapphire crystal covers the hour and minute display, with several layers of anti-reflective coating on both sides.