Sapphire SpecialBestfit RX (Generic) Glasses suitable for various watches, e.g. Yacht Master, Sea Dweller. Products nameVersionmaterialdiameterheight - centrefits toitem No.RXflat with gasketsapphire322/3201,80116680, 116681, 116688, 1166899811116680RXflat without gasketsapphire2701,50268621, 2686559811268621RXdomed with gasketsapphire3155.50116660, 1266609811116660RXflat with gasket/loupesapphire3153.50126600, 1266039811126600