Stainless steel case with a stainless steel bracelet. Engraved bezel bezel. Black dial with luminous hands and stick hour markers. Minute markers around the outer rim. Luminiscent minute markers around the outer rim. Three - 60 seconds, 30 minutes and 24 hours. Self winding automatic movement. Scratch resistant sapphire crystal. Screw down crown. Case diameter: 40 mm. Deployment clasp. Water resistant at 100 meters / 330 feet. AdditionalInfo: perpetual cosmograph. Rolex Daytona Black Index Dial Oyster Bracelet Mens Watch 116520BKSO.