The Isobrite T100 Naval Series comes in three models. The blue-dial Naval Mariner, the black-dial Naval Amphibian, and the all-black Naval Destroyer.Each T100 model crafted from 316L stainless steel has 16 tritium markers surrounding the bezel and provides bright illumination for evening and underwater visibility.The watches with the screw-down crown are rated 300m/990ft perfect for all types of professional and recreational dives.The lightweight unidirectional ceramic bezel in addition to being incredibly heat and corrosion-resistant adds richness and luster to the watch.Whether you are looking for a handsome classic dress watch that stands out in the crowd or a functional robust dive watch, the Isobrite Naval Series should be at the top of your list. Weight is 7.4 oz.