Rolex Sky-Dweller 18kt Yellow Gold, Saros Annual Calendar with Dual Timezone, Black Index Dial, Fluted Bidirectional Rotatable Rolex "Ring Command" Bezel, Screw-Down Crown with Twinlock Double Waterproofness System, Superlative Chronometer Rolex Manufacture Caliber 9001 Self-Winding Movement with Paramagnetic Blue Parachrom Hairspring and High-Performance Paraflex Shock Absorbers, 18kt Yellow Gold Oyster Bracelet with Easylink 5mm Comfort Extension Link, 42mm

It has an integral 18K yellow gold Oysterlink bracelet with a foldover deployant Oyster clasp, and a scratch-resistant sapphire crystal. It has the rotatable "Ring Command" bezel that can be set to three functions, including date, local time or a GMT reference time, utilizing the winding crown and allowing unrestricted setting. It has a solid screw-down case back and the Twinlock double water-resistant Rolex crown. The 42mm diameter solid three-body case, integral lugs, bracelet, and fluted rotating bezel are polished/brushed. The dial is champagne with Luminescent hour markers, skeleton hands with luminous inlays, and an outer minute/seconds track with 12 indicators for the Saros annual calendar with discreet rectangles that turn black to show the corresponding month. An inner white dial measures the GMT 24-hour time zone with black Arabic numerals, and there is a red triangle indicator at 12 o’clock. There is a rapid-set date aperture window at 3 o’clock. It has a 72-hour power reserve at full wind, and it’s water resistant to 100 meters/330 feet. This is a certified Swiss chronometer, tested by the Swiss Official Chronometer Testing Institute (COSC). The case, dial, and movement are all signed.

The mechanical automatic self-winding Rolex caliber 9001 movement is rhodium plated, with 380 components, a Paramagnetic blue Parachrom hairspring with a Breguet overcoil, and high-performance Paraflex shock absorbers. It has a traversing balance bridge, and a large balance wheel with variable inertia and four gold Microstella nuts. The mechanism oscillates at a frequency of 28,800 vph (4 Hz).

Reference No. 326938