The Longines Hydro Conquest Black Dial L3.780.4.56.6 combines a 39mm round shaped stainless- steel case and silver stainless steel bracelet with a push button deployment clasp. It has a black analogue dial which is protected beneath several layers of anti-reflective sapphire crystal glass. Power is generated by the automatic movement. This model also has a water resistance of up to 300 metres. Watch also features a 72 hour power reserve. • Powered by the automatic movement with a power reserve of up to 72 hours. • Presented on a stainless steel bracelet with fold over clasp. • Scratch resistant sapphire crystal glass. • 39mm case width. • 300 metre water resistance.