Description Movement 6R55 Drive system Mechanical automatic winding (with manual winding) Accuracy: daily difference 25 seconds to -15 seconds Maximum winding time lasts approximately 72 hours 24 gems Second hand stop function Case and strap material stainless steel Shell coating Diamond Shield Housing size Thickness: 13.0mm Width: 40.0mm Length: 46.4mm Glass material curved sapphire Glass coating Internal anti-reflective coating Luminous (hands, scales, bezel) One-touch submersible extender method Waterproof to 300m for diving Antimagnetic available Reverse rotating bezel screw crown Double lock Screw back cover