Model: WD6105 Movement: Japan NH35 automatic, 41 hours of energy storage. Case material: 316L stainless steel Case back: 316L stainless steel Bezel: 120 click unidirect rotational ceramic bezel Watch mirror: sapphire crystal with AR coating. Water resistance: 200 m / 20 ATM Luminous: Swiss C3 green super luminous. Crown: Screwdown Crown Watch Dimension Case diameter: 43.8mm ( without crown) Case length: 46.8mm (lug to lug) Case thickness: 13.5mm Lug width: 20mm