ROLEX REF. 326139 SKY-DWELLER WHITE GOLD Rolex, Oyster Perpetual Sky-Dweller Superlative Chronometer Officially Certified, case No. 6524D910, Ref. 326139. Sold March 31st, 2015. Fine, center seconds, self-winding, water-resistant, 18K white gold Chronometer wristwatch with annual "SAROS" calendar, Ring Command Bezel and an 18K white gold Rolex folding Oysterclasp with Easy Extension Link. Accompanied by the original fitted box, warranty card and instruction booklet. Three-body, polished and brushed, screw down case back and Twinlock winding crown, fluted revolving bezel for the selection of 3 different functions, sapphire crystal with cyclops lens. Bicolor black and silver with applied radial Arabic white gold numerals, outer minute/ seconds divisions, apertures for the date and month display by contrasting color in one of 12 windows, off-center 24 hour ring for the second time zone. Luminous white gold baton hands. Cal. 9001, rhodium-plated, 27 jewels, straight-line lever escapement, monometallic balance, shock absorber, self-compensating free-sprung Breguet balance spring, Microstella regulating screws, hack mechanism.