The Squale 1521 Blue Blasted 1521BLUEBL.VO is a professional diving watch featuring a 42mm bead-blasted 316L stainless steel case, a matte blue dial with Super-LumiNova C3 luminescence, and a black rubber strap. It is powered by the Sellita SW 200-1 automatic movement, offering a 38-hour power reserve and operating at 28,800 vibrations per hour. The watch includes a unidirectional aluminum bezel, a screw-in crown positioned at 4 o'clock, and provides water resistance up to 500 meters. The sapphire crystal has an anti-reflective coating for enhanced readability. Reference number: 1521BLUEBL.VO.