Since the year 2012, Rolex had released a brand new model with the name of Sky=Dweller wristwatches. It is rare for Rolex to release a totally new family of timepieces with a new name. Furthermore, the Sky-Dweller is also the most complicated delicate watches of Rolex. Because it contains a movement that combines both a GMT indicator as well as an annual calendar. Today I will show you one style of them.  18K white gold case Rolex Oyster Perpetual Sky…