The Longines Master Collection Chronograph Moonphase L2.673.4.92.0 is a men's watch featuring a 40 mm stainless steel case with a sunray blue dial. It is powered by the automatic Caliber L687 movement, offering a power reserve of approximately 66 hours. The watch includes a chronograph function, moon phase display, and a date indicator via a half-moon central hand. It is water-resistant up to 30 meters and comes with a blue alligator leather strap secured by a triple safety folding clasp with push-piece opening mechanism. Reference number: L2.673.4.92.0.