Longines Master Collection

The Longines Master Collection, reference L2.257.5.77.7, has a 29 mm round case in steel with an 18 karat yellow gold cap. The watch is set with diamonds. Measuring 9 mm thick and 34.5 mm lug-to-lug, the case has a water-resistance rating of 30 metres. Self-winding calibre L592.5 has up to 45 hours of power reserve and is visible through a transparent case back. The dial is covered by 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 fastens with a triple safety folding clasp and a push-piece opening mechanism.