Longines Master Collection

The Longines Master Collection, reference L2.893.4.57.6, has a 42 mm round case in steel. The watch is set with diamonds. The case is 9.64 mm thick and 49.6 mm lug-to-lug, with water resistance rated to 30 metres. Self-winding calibre L888.5 provides up to 72 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. Polished silvered hands indicate the hours and minutes on the black lacquered polished dial.