LONGINES HydroConquest Automatic delivers robust dive performance and refined style, pairing a 39 mm stainless steel case with high water resistance for everyday wear and aquatic use. Key attributes: Black | Steel | Stainless steel | Water resistance 30 bar (300 m) | Sapphire crystal | Automatic movement (Calibre L888) with ~72-hour power reserve | Date display at 3 o'clock | Unidirectional rotating ceramic bezel | Screw-down crown | Folding clasp with push-button release | Sunray black dial | Arabic numerals and index markers | Luminescent hands and markers | Brushed and polished case finish | Dimensions & fit: Case diameter: 39.00 mm | Composition & care: Case: Stainless steel | Bracelet: Stainless steel | Crystal: Sapphire | Bezel: Ceramic | Clasp material: Stainless steel | Wipe clean with a soft cloth; avoid contact with strong chemicals and extreme temperatures; have water-resistance seals inspected by an authorized service center periodically.