The Squale 1521 Full Luminous, reference 1521FULL.HT, is a Swiss-made diving watch featuring a 42 mm polished stainless steel case and a fully luminescent dial coated in Super-LumiNova C3 for enhanced visibility in low-light conditions. Powered by the automatic Sellita SW200-1 Elaboré movement, it offers a 38-hour power reserve and operates at a frequency of 28,800 A/h. The watch includes a unidirectional aluminum bezel, a flat sapphire crystal with anti-reflective coating, and a screw-down crown and case back, ensuring water resistance up to 500 meters. It is fitted with a black rubber strap with a 20 mm lug width and a 16 mm stainless steel buckle. Additional features include a date function and printed black indices on the dial.