AirKing Diameter: Approximately 41 mm. Men's Wristwatch; Auto Chronometer movement Caliber 2836; Solid link stainless steel case including screw down bezel in 18K rose gold with fluted edges and sapphire crystal with magnifying cyclops lens over the date window, also sapphire crystal front; Stainless steel bracelet with folding clasp crafted from Oystersteel and solid 18K rose gold end links; Silver-tone dial enhanced by Rolex's signature 'Sundust' application (nickel-based alloy); Luminous hour markers and hands; Water resistant to 100 meters.