Rolex is filling out the Sky-Dweller collection with new variants, including one in white gold with a black dial, the most modern looking version of the Rolex annual calendar yet.

Two years ago Rolex unveiled its most complicated watch yet, the Sky-Dweller, an extremely impressive and cleverly engineered annual calendar with second time zone function. A breeze to operate and adjust, the Sky-Dweller has a function selector bezel that allows everything to be done via the crown.

But the first three Sky-Dweller timepieces were large, shiny in a somewhat outdated ostentatious style. At Baselworld 2014, Rolex added three new Sky-Dweller variants to the line-up, fortunately including one in white gold with a black dial (ref. 326139) on a black alligator strap.

The new Sky-Dweller in white gold has Arabic numerals with luminous filling, which along with the red accents on the dial give it a clean and contemporary look.

The second new model is in yellow gold with a silver dial (ref. 326138), and the last is in rose gold with a matching bracelet (326935).

Prices have yet to be announced, but the current model Sky-Dwellers retail for US$39,550 on strap and between US$46,150 and US$48,850 on bracelet, and these new additions will cost about the same as prior models.