Rolex 326138 Sky Dweller Silver Dial 18k Yellow Gold / Alligator (33210)

33210 Rolex 326138 Sky Dweller, 18K yellow gold with yellow gold deployment buckle, automatic Rolex caliber 9001, COSC, rotatable command bezel, GMT located in center of dial, 72 hour power reserve, date at 3 Oclock, red indicator on outer dial indicates the month of the Year, silver dial with yellow gold Roman numerals, size: 42mm, water resistant to 100M, sapphire crystal, scrambled serial (2015), like new with original box and papers dated December 2017.


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More about Rolex 326138 Sky Dweller Silver Dial 18k Yellow Gold / Alligator

This is an 18K yellow gold Rolex Sky Dweller 326138. It has a leather strap with an 18K yellow gold deployment buckle, and a scratch resistant domed sapphire crystal with a Cyclops magnifying bubble over the instantaneous SAROS annual calendar at 3 o'clock. It has a rapid-setting function for the date. There is a rotating bezel, for easily selecting the watch functions through an interface between the movement and case. The 42mm diameter solid three-body case, fluted bezel, Twinlock screwed-down winding crown, and downturned lugs are polished/brushed. It has a solid screwed-down case back. The dial is silver with applied yellow gold Roman numeral hour markers, and illuminated gold skeleton/baton hands with a center sweep seconds hand. An offset inner chapter ring with a red arrow indicates the 24-hour home time, while the hands can be adjusted for a second time zone, and visa-versa. There is a month display with 12 rectangular apertures around the circumference of the dial that indicate the month by number, and it includes a stop-seconds function for accurate time setting. It's a Certified Official Swiss Chronometer (COSC), it's water resistant to 100 meters/330 feet, and it has a 72-hour power reserve at full wind. The 10.8mm thick case, dial, and movement are all signed.

This Rolex Sky Dweller 326138 has a mechanical automatic self-winding Rolex caliber 9001 movement that's rhodium-plated and it's constructed with 40 jewels, a straight-line lever escapement, and a shock absorber mechanism. It has bi-directional self-winding via a perpetual rotor. There is a monometallic balance that's adjusted to 5 positions, and a free-sprung self-compensating Breguet balance spring. It includes a paramagnetic blue Parachrom hairspring, Microstella regulating screws, and a central hacking mechanism. The rotor oscillates at a frequency of 28,800 vph (4 Hz).

Rolex has been making GMT watches since the 1950s, but this Rolex Sky Dweller 326138 is their first annual calendar complication, which made its debut in 2012. The Sky Dweller annual calendar is based on a mechanism called SAROS - after the Greek term for the 18-year cycle of the sun, earth, and moon that registers both lunar and solar eclipses. Two gear ratios and four gear wheels were added to the traditional Rolex date calendar in order to make it a full annual calendar, only requiring re-setting once a year at the end of February.