The Longines Master Collection Chrono Moonphase L2.773.4.61.6 is a 42mm stainless steel automatic watch featuring an anthracite dial with applied Roman numerals and pink hands. It includes a chronograph function, moon phase display at 6 o'clock, and a date indicated by a central hand. The self-winding mechanical movement operates at 28,800 vibrations per hour and offers a power reserve of up to 66 hours. The watch is water-resistant to 3 bar and has a scratch-resistant sapphire crystal with anti-reflective coating on both sides. The stainless steel bracelet is secured with a triple safety folding clasp and push-piece opening mechanism. Reference number: L2.773.4.61.6.