It is made for a Rolex Submariner with a plastic crystal and for no crown guard #6536, 6538, 5508, 5510 and others. CERAMIC BEZEL INSERT FOR ROLEX SUBMARINER ENGRAVED # 16610 16613 BLUE SILVER. BEZEL INSERT FADED BLACK TO GREY FOR ROLEX SUBMARINER 1665 5508 1680 7928 GREY.