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 Seiko's first sports watch, the 1959 Alpinist, this extraordinary Black Series Limited Edition, available only in a controlled production run of 5,500, expresses the view seen through a night vision scope, offering a black dial and 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. Designed for a wide range of adventure activities, this exceptional timepiece, in stainless steel with black hard coating, includes a rotating inner compass ring, magnified date window, sapphire crystal with anti-reflective coating on the inner surface, screwdown crown and see-through caseback, and tri-fold push button release clasp. The 24-jewel automatic movement beats at a frequency of 21,600 vibrations per hour, with a power reserve of approximately 70 hours and manual winding capability.