The Longines Master Collection Moonphase L2.919.4.77.3 is a 42mm stainless steel watch featuring a silver 'barleycorn' dial adorned with diamond hour markers. Powered by the automatic Caliber L899 movement, it offers a moonphase display and a date indicator at the 6 o'clock position. The watch has a power reserve of approximately 72 hours and operates at 25,200 vibrations per hour. It is water-resistant up to 30 meters and comes with a brown alligator leather strap equipped with a triple safety folding clasp and push-piece opening mechanism. Reference number: L2.919.4.77.3.