The Longines L3.781.3.78.7 HydroConquest watch combines a 41mm round shaped stainless steel case and two colour bracelet with a fold over clasp. It has a grey analogue dial with a date display and Super-Luminova coated hands which are protected beneath scratch resistant sapphire crystal glass with several layers of anti-reflective coatings applied to both sides. Power is generated by the Calibre L888 automatic movement with a power reserve of approximately 72 hours. This model also has a lug distance of 21mm, a unidirectional rotating ceramic bezel, and a water resistance of up to 300 metres.