Model: WD6105-LT Movement: Japan NH35 automatic, 41 hours of energy storage. Case material: 316L stainless steel Case back: 316L stainless steel Bezel: 120 click unidirect rotational bezel. ARROW HAND version: ceramic bezel insert with BGW9 blue lume. Sword Hand version: Aluminum bezel inert without lume. Watch mirror: sapphire crystal with AR coating. Water resistance: 200 m / 20 ATM Luminous: BGW9 blue 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