Prospex PADI Special Edition. Designed for those who treat life as the ultimate adventure, Seiko Prospex keeps moving forward, meeting every challenge with technological excellence and winning design. This stunning Special Edition celebrates Seiko’s official partnership with PADI, the world’s leading scuba diver training operation, particularly in the distinctive patterned and gradated blue dial reflecting the surface of the ocean as seen from under water as the sunlight reaches through the waves on the surface. With a date calendar, the dial also features LumiBrite hands and markers, while vibrant blue accents on the blue ceramic uni-directional rotating elapsed timing bezel recall the signature PADI colors. Following ISO standards for scuba diving, this exceptionally durable timepiece offers a rugged stainless steel case with super-hard coating based on one of Seiko’s most iconic diving styles, sapphire crystal with anti-reflective coating on the inner surface, screwdown crown and caseback, and a tri-fold push button release clasp with secure lock and extender. For reliable timing in rough waters, the 24-jewel automatic movement beats at a frequency of 21,600 vibrations per hour, with a power reserve of approximately 70 hours, and offers manual winding capability. 200m Water Resistant