Orient Star Sports Collection Diver RK-AU0302L Automatic Winding From Japan. Case material 316L stainless steel. Rotating bezel (reverse rotation prevention structure). 51.1 mm / 2.01 inch. 43.6 mm / 1.72 inch. 14.0 mm / 0.55 inch. 20.0 mm / 0.79 inch. Mechanical self-winding (F6N47 with manual winding) / day difference +25 seconds to -15 seconds / 50 hours or more drive. Return only be accepted for unused and unopened packages. We do not mark merchandise values below value or mark items as "gifts" - the US and International government regulations prohibit such behavior. Thank you...