Rolex 326938 bk Oyster Perpetual Sky-Dweller Watch. 42mm 18K yellow gold case, screw-down back, screw-down crown, fluted bezel with bidirectional rotatable Rolex Ring Command, scratch-resistant sapphire crystal with cyclops lens over the date and double anti-reflective coating, black dial, index hour markers with Chromalight, Rolex calibre 9001 automatic movement , second time-zone displayed via off-center rotating disc, Saros annual calendar with date at 3 o'clock and month indicated in discrete apertures at each of the 12 hour marks, Oyster bracelet with flat three-piece links, folding Oysterclasp buckle with Easylink 5mm comfort extension link. Waterproof to 100 meters.