Yacht-Master model was first introduced back in 1950s. The model is designed to bring elegance to the classic diver's watch; its sculpted cases and sparkling dials appeal to the passionate sailor. All Yacht-Masters have a screw down, trip-lock crown and a sapphire crystal designed to be scratch resistant. This pre-owned Rolex Yacht-Master model 16623 is powered by an automatic movement with steel white metal case and has a one year warranty.