Longines Master Collection

The Longines Master Collection, reference L2.257.4.77.6, has a 29 mm round case in steel. The watch is set with diamonds. The case is 9 mm thick and 34.5 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. Polished silvered hands indicate the hours and minutes on the silver barleycorn dial. A steel bracelet fastens with a triple safety folding clasp and a push-piece opening mechanism. A date display and central seconds appear on the dial.