Prospex Alpinist. Seiko Prospex challenges every limit with timepieces created to exceed expectations, engineered with superior style and innovative technology for the sea, sky or land. Driven by a heritage of iconic design, Prospex continues to move forward with excellence in precision timekeeping, crafted for the modern world. Inspired by Seiko’s first sports watch, introduced in 1959 for daring mountaineers, this rugged yet refined creation celebrates high-intensity timekeeping, prominently displaying the Alpinist logo on the dial. Equipped with a rotating inner compass bezel for outdoor adventure, the design features a classic black dial with the signature Arabic numerals and wedge-shaped indices of the series, as well as LumiBrite hands and markers. Visible through the transparent caseback, marked with the Alpinist “mountain” symbol, the 24-jewel automatic movement beats at a frequency of 21,600 vibrations per hour, with a power reserve of approximately 72 hours and manual winding capability. Crafted of stainless steel with super-hard coating, this timepiece includes a tri-fold push button release clasp and secure screwdown crown. 20 bar, 200M Water Resistant.