1968 Heritage Diver's Watch. 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. With rich brown dial and black bezel warmed by rose-gold accents, this exceptional watch re-interprets Seiko's landmark 1968 diver's watch with updated technology and sleeker lines for versatile wear. The 24-jewel automatic movement beats at a frequency of 21,600 vibrations per hour, with a power reserve of approximately 70 hours, and provides manual winding capability. Featuring a date calendar and large LumiBrite markers and hands for enhanced legibility, this superbly functional timepiece, in stainless steel with super-hard coating, includes an anti-reflective sapphire crystal, screwdown crown and caseback, and tri-fold push button release clasp with secure lock and extender, and follows ISO standards for scuba diving to depths of up to 200 meters. 200m Water Resistant