details rolex oyster perpetual 36 comes in a signature green case with crown logo plaque and manual screw-down winding crown, twinlock double waterproofness system stop seconds for precise time setting 48 hour power reserve swiss-made with manufacturer serial numbers dial blue dial oystersteel polished solid 18k white gold fluted bezel luminescent hands, arabic numerals & index hour markers superlative chronometer oyster bracelet fitted with oyster clasp with easylink comfort extension oyster architecture monobloc middle case, screw-down case back and winding crown diameter 36 mm material oystersteel crystal scratch-resistant sapphire water resistance waterproof to 100 metres / 330 feet