The watch has sapphire crystal with anti-reflective coating on the inner surface. The 40mm case is made of stainless steel (hard coating), and the dark color of the steel matches the black dial. This watch is equipped with LumiBrite on the hands, index(es) and bezel for enhanced visibility during dives or other adventures. Bright orange coloring on the indices between 12 o'clock and 3 o'clock are a beautiful contrast to the darker colors in the watch. The SPB253 is powered by the 6R35 caliber automatic movement with manual winding, and has a power reserve of approximately 70 hours. Water resistance up to 200m. An additional silicone strap is included with this limited edition timepiece.