Rolex Sky-Dweller 42 mm

The Rolex Sky-Dweller 336934-0001, a GMT watch, measures 42 mm across in steel and gold. The case stands 14.1 mm thick and carries a fluted bezel that also works the Ring Command system for setting functions. A sapphire crystal with a Cyclops lens sits over the date, and the mint green dial shows luminous hands and indices for legibility. Inside is the self-winding calibre 9002, a chronometer-certified movement combining a GMT function with an annual calendar that only needs adjusting in March. The month shows through one of twelve apertures around the dial rim. A steel Oyster bracelet with a folding Oysterclasp and Easylink extension completes the watch. The screw-down crown, part of the Twinlock system, helps hold the case to its 100 metre water resistance rating.