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. Based on the 1968 Navigator Timer, the first Seiko mechanical GMT watch with a rotating bezel, this extraordinary Limited Edition is available only in a controlled-production run of 4,000, with the production serial number engraved on each caseback. With the trim, sophisticated lines of the original, including a smaller 38.5mm case, comfortable five-row bracelet and classic box-shaped sapphire crystal with the addition of anti-reflective coating on the inner surface, this rugged, yet elegant watch also features a gray radial sunray dial with a vintage Seiko logo, while the screwdown caseback offers the original layout. The red GMT hand, as well the one-hour increment markings on the bi-directional rotating bezel, permit easy 24-hour reading. With an exceptional power reserve of 72 hours, the 24-jewel automatic movement beats at a frequency of 21,600 vibrations per hour and offers manual winding capability. Crafted of stainless steel with super-hard coating, this superb timepiece also includes a date calendar and a tri-fold push button release clasp.