The Rolex Sky-Dweller reference 336934 represents the 2021 evolution of Rolex's most complex travel watch, replacing the long-serving 326934 with refined case architecture, redesigned lugs, and an upgraded Caliber 9002 movement. The 42mm Oyster case is built in White Rolesor — Oystersteel paired with an 18k white gold fluted bezel that doubles as the patented Ring Command system for adjusting the watch's annual calendar, second time zone, and date functions through the winding crown. The white lacquered dial carries applied white gold hour markers, the off-center 24-hour disc displaying the second time zone, and the signature Saros annual calendar with the month shown in twelve apertures around the dial perimeter — a complication that requires only one date correction per year. Powered by the in-house Rolex Caliber 9002, the refined evolution of the patent-laden 9001 with improved efficiency and Superlative Chronometer certification, with 72 hours of power reserve, paramagnetic blue Parachrom hairspring, and Paraflex shock absorbers. Water-resistant to 100 meters and worn on the Oystersteel Jubilee bracelet with concealed Crownclasp. 2021 production, pre-owned in excellent condition. Affirm financing available at checkout.