Hublot Aero Big Bang Skeleton Rose gold Ceramic 44mm Chronograph Automatic Mens Watch, 310.PT.1180.RX. Self-winding automatic HUB4214 movement with chronograph function. Black ceramic bezel. Exhibition case-back. Hublot black skeletonized dial with rose gold stick hour markers. Push-down crown. Scratch-resistant sapphire crystal. Hublot black rubber strap with rose gold deployment buckle.