The Longines Master Collection L2.357.4.99.6 is a 34 mm stainless steel watch featuring a green dial. It is powered by a self-winding mechanical movement operating at 25,200 vibrations per hour, with a monocrystalline silicon balance-spring and a power reserve of up to 72 hours. The watch includes a date function and is water-resistant up to 3 bar. It has a scratch-resistant sapphire crystal with multiple layers of anti-reflective coating on both sides. The stainless steel bracelet is equipped with a triple safety folding clasp and push-piece opening mechanism. Reference number: L2.357.4.99.6.