Prospex Black Series 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. Based on an iconic design, this extraordinary Black Series Limited Edition, available only in a controlled production run of 4,500 with the serial number engraved on each caseback, expresses the view seen through a night vision scope, and features hands and markers with Seiko's brighter and longer lasting "Green LumiBrite Pro," suitable for professional usage and providing maximum visibility with the color most recognizable in the dark. Following ISO standards for scuba diving to depths of up to 200 meters, this exceptional timepiece includes a 24-jewel automatic movement with a frequency of 21,600 vibrations per hour, a power reserve of approximately 70 hours and manual winding capability. With Seiko's thinnest mechanical diver's watch case, in stainless steel with black hard coating, this dramatic watch includes a black dial, date calendar, curved sapphire crystal with anti-reflective coating on the inner surface, screwdown crown and caseback, black uni-directional rotating elapsed timing bezel and black silicone strap. 200m Water Resistant.