The Seiko Prospex SPB351 cave diver’s watch is powered by an automatic movement inside of a 43.5mm titanium case with a scratch-resistant super hard coating. The unidirectional rotating bezel is a two-tone gray color. The light blue textured dial features LumiBrite hands and indixes as well as a date display. It is protected by an anti-reflective sapphire crystal. The titanum bracelet is secured by a deployant clasp. This U.S. Special Edition watch is water resistant to 200 meters.