The Squale 1521 Classic 1521CL.NT is a professional dive watch featuring a 42mm polished 316L stainless steel case, known for its corrosion resistance. It includes a black 120-click unidirectional rotating bezel with a white 60-minute scale for tracking elapsed time underwater. The black dial offers high legibility with Superluminova C3-coated circular and baton-style hour markers and hands, including a bright orange minute hand for enhanced visibility. A date display is positioned at 3 o'clock. The watch is powered by a Swiss-made Sellita SW200-1 automatic movement, providing a 38-hour power reserve. It is water-resistant up to 500 meters, suitable for professional diving. The timepiece is completed with a black rubber strap and a stainless steel pin buckle clasp. Reference number: 1521CL.NT.