Rolex 278243 sdo Oyster Perpetual Datejust Watch. 31mm yellow Rolesor case comprised of Oystersteel and 18K yellow gold, screw-down back, screw-down crown with twinlock double waterproofness system, 18K yellow gold domed bezel, scratch-resistant sapphire crystal with cyclops lens over the date, silver dial, diamond hour markers, Rolex calibre 2236 perpetual self-winding movement with date at 3 o'clock, approximately 55 hours of power reserve, yellow Rolesor Oyster bracelet made from a combination of 904L steel and 18K yellow gold with flat three-piece links, folding Oysterclasp buckle with Easylink 5mm comfort extension link. Waterproof to 100 meters. Baselworld 2019 release.