Longines Master Collection

The Longines Master Collection, reference L2.450.4.87.6, has a 34 mm round case in steel. The watch is set with diamonds. The case is 9.3 mm thick and 41.5 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. Blued steel hands indicate the hours and minutes on the white mother-of-pearl dial. A steel bracelet fastens with a triple safety folding clasp and a push-piece opening mechanism with a fine adjustment system. A scratch-resistant sapphire crystal covers the hour and minute display, with several layers of anti-reflective coating on both sides.