Longines Master Collection

The Longines Master Collection, reference L2.128.5.77.7, has a 25.5 mm round case in steel and gold. The watch is set with diamonds. Case dimensions include a thickness of 8.9 mm and a lug-to-lug length of 30.5 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. Over the dial is a scratch-resistant sapphire crystal. Gilt hands indicate the hours and minutes on the silver barleycorn dial. A bracelet in steel with an 18 karat yellow gold cap closes with a triple safety folding clasp and a push-piece opening mechanism.