Rolex Yellow Gold Sky-Dweller Watch - Black Index Dial - Oysterflex Bracelet - 2020 Release - 326238 bki42mm 18K yellow gold case, screw down back, screw down crown with twinlock double waterproofness system, fluted bezel, scratch resistant sapphire crystal with cyclops lens over the date, bright black dial, index hour markers, Rolex calibre 9001 automatic movement with 24 hour display on off centre disc, second time zone, instantaneous annual calendar at 3 o'clock and rapid setting of the date, month display via 12 apertures around the circumference of