The Longines HydroConquest GMT L3.790.4.56.9 is a 41mm stainless steel watch featuring a sunray black dial and a black rubber strap. It is powered by the Longines Caliber L844 automatic movement, offering a 72-hour power reserve. The watch includes a GMT function, allowing the wearer to track multiple time zones. Additional features include a unidirectional rotating ceramic bezel, a screw-in crown, and water resistance up to 300 meters. The scratch-resistant sapphire crystal has multiple layers of anti-reflective coating on both sides. Reference number: L3.790.4.56.9.