Model: Invicta Limited Edition Subaqua NOMA IV Automatic Chrono 6521 Case material: Two tone gun metal ionic plated solid stainless steel case with screw down case back Case dimensions: 50mm case diameter Movement: Swiss Valjoux ETA 7750 automatic movement Crystal type: Flame fusion crystal Water resistant: 500 meters Crown: Screw down crown and pushersFace color: Black dial Band type: Two tone gunmetal ionic plated solid stainless steel bracelet with fold over securety claspBand length: 9 1/2 inches Weight: 13 oz Additional features: Chronograph functions measures to 1/10 second and up to 30 minutes; Day and date display; Luminous hands and markers. Individually numbered. Limited to 500 pieces