This is the Momentum Atlas ti Solid Titanium Dive Watch w/ SLK Rubber Strap Features of this Fantastic Watch: Solid titanium case Anti-reflective mineral crystal The small size has a case diameter of about 31.5mm The large size has a case diameter of about 38.5mm The ultimate understated sports watch The Atlas is Momentum's 21st-century take on the classic field watch Designed for casual wear and everyday use Features oversized dial markings affixed to a matte black dial Date calendar at the 3 o'clock position The 38-millimeter case is a stylish solid titanium with a modern matte finish Perfectly complemented by an SLK rubber band Equipped with a special screw-down, locking crown Waterproof tested to a depth of 330 feet (100 meters) An anti-reflective mineral crystal makes the watch easy to read Powered by Japanese-quartz movement Discover the colourful Momentum Atlas Collection. A serious field watch built with a lighthearted twist. Oversized dial markings and outstanding luminous coatings for maximum legibility.