The Rolex Cosmograph Daytona 116505bkdo is an automatic movement luxury watch. Features include an 18kt yellow gold case, matching 18kt yellow gold bracelet, fixed gold bezel with tachymeter markings, black dial accented by luminous gold hands and diamond markers, sapphire crystal glass, Calibre 4130 mechanical movement (based on the Rolex 4030), central second hand, hour and minute subdials for chronograph functions, screw-down case back, and is water resistant to 100 meters. This Swiss made timepiece offers a power reserve of about 72 hours.