Oris Men's 623 7582 4051LS Artelier Automatic Leather Strap Watch Quality Automatic movement; Functions without a battery; Powers automatically with the movement of your arm Automatic winding, bi-directionally rotating red rotor; Power Reserve: 44 Hours Center hands for hours and minutes, subsidiary second at 6 h, date window, date corrector, fine timing device and stop-second Sapphire crystal, domed on both sides, anti-reflective coating inside Water resistant to 99 feet (30 M): withstands rain and splashes of water, but not showering or submersion