1965 Diver's Watch Recreation 55th Anniversary Limited 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 recreations and reinterpretations of landmark achievements. Joining a special collection marking the 55th anniversary of Seiko's first diver's watch, this extraordinary Automatic Diver, available only in a limited edition of 1,700, with the serial number engraved on each caseback, also celebrates Seiko's role in Antarctic exploration as essential equipment for the work of the Japanese Antarctic Research Expedition (JARE). The smoothly tapered case, crafted of Seiko's new Ever-Brilliant Steel, for an exceptional level of corrosion resistance and a lighter, brighter finish, features hairline finishing to suggest a glacier. Designed to evoke the ocean depths at the point at which blue yields to darkness, the marine blue dial features a date calendar and LumiBrite hands and markers. The 26-jewel automatic movement beats at a frequency of 28,800 vibrations per hour, with a power reserve of approximately 50 hours, and can be wound manually or automatically. Upgraded with a box-shaped anti-reflective sapphire crystal, this exceptional watch follows ISO standards for scuba diving to depths of up to 200 meters and includes a black one-way rotating elapsed timing bezel and screwdown crown and caseback, as well as a two reinforced silicone straps, in black and marine blue, paying tribute to the advanced original "TROPIC" design. 200m Water Resistant