Asia Valjoux 7750 Automatic Movementwith Smooth Sweeping Seconds HandScrew-in watch crownFully Functional Chronograph Pusher at 2:00 starts/stops Chronograph Pusher at 4:00 resets ChronographSolid 316 Stainless Steel CaseHigh quality genuine Rubber Strap with PVD BuckleSapphire Crystal Glass FaceWater-ResistantSize:46mm