Longines Master Collection

The Longines Master Collection, reference L2.449.4.87.2, has a 30 mm round case in steel. The watch is set with diamonds. Case dimensions include a thickness of 9.1 mm and a lug-to-lug length of 36.8 mm; water resistance is rated to 30 metres. Self-winding calibre L592.5 has up to 45 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 blue alligator leather strap closes with a triple safety folding clasp and a push-piece opening mechanism with a fine adjustment system. Over the dial is a scratch-resistant sapphire crystal, with several layers of anti-reflective coating on both sides.