1970 Heritage Diver's Save the Ocean Special Edition. Designed for those who treat life as the ultimate adventure, the Seiko Prospex line meets every challenge with technological excellence and style. Part of a rich legacy of innovation in high-intensity timekeeping, Prospex continues to celebrate a long history of sports watch excellence with re-creations and re-interpretations of landmark achievements. With contemporary styling and technology, this versatile timepiece reimagines Seiko's famed 1970 diver's watch, complete with the iconic case design that revolutionized underwater safety with a recessed crown creating a built-in crown guard at 4 o'clock. Inspired by the intricacies of glacial formation, this Special Edition is themed to evoke the ice of Arctic regions, including the North Pole, where legendary adventurers such as Naomi Uemura relied on Seiko diver’s watches to meet every challenge, Today, it advances that unique history in support of the Seiko "Save the Ocean" campaign, dedicated to marine conservation. This masterfully updated design is crafted of stainless steel with super-hard coating, and includes a curved anti-reflective sapphire crystal, blue uni-directional rotating elapsed timing bezel, and screwdown crown and caseback. The patterned white dial features a date calendar and LumiBrite hands and markers. Following ISO standards for scuba diving to depths of up to 200 meters, this exceptional watch offers manual winding capability and includes a 24-jewel automatic movement with a frequency of 21,600 vibrations per hour and a power reserve of approximately 70 hours. 200m Water Resistant