Prospex Automatic Diver. Designed for those who treat life as the ultimate adventure, the Seiko Prospex line meets every challenge with technological excellence and winning design. Upgrading an iconic style with a ceramic bezel and a sapphire crystal with anti-reflective coating on the inner surface, this rugged, yet distinctive, timepiece offers a three-dimensional pressed pattern on the rich black dial, mirroring the shape of the bezel edge. LumiBrite hands and markers, and a magnified day/date window ensure legibility in rough conditions.