The Audemars Piguet Royal Oak Openworked is the first Royal Oak with a skeletonized movement displaying the intricacies of the movement from the dial. The watch uses the Audemars Piguet calibre 3129 automatic movement which has a twenty two carat gold occulting weight. The watch has either a stainless steel case with a stainless steel strap or a eighteen karat pink gold case with an alligator strap.