L3.688.4.03.6Ref

The HydroConquest series, labeled diving watches par excellence, is a tribute to ocean conquerors and lovers of the open sea. Each model meets demanding criteria: water resistance to 30 bar (300 m), unidirectional rotating bezel, screw-down case and screw-in crown, lateral crown guard, and double security folding clasp with integrated dive extension. These unyielding safety features blend with the calm of the deep, embodying performance and elegance—a signature Longines combination.