Recently, Hublot introduced a new addition to its line of Classic Fusion skeleton watches: the Hublot Classic Fusion Classico Ultra-Thin All Black. The ultra-thin watch has diameter of 45 mm and a case thickness of just 8.3 mm. The skeletonized movement, Hublot’s manual-winding HUB1300 “Classico” caliber, was designed and built entirely at the brand’s manufacture in Nyon. Composed of 130 parts, including 23 jewels, it measures a wafer-thin 2.9 mm in thickness. Because of the openworked structure of the movement, wearers can view the watch’s regulating organ, its balance and its escapement, at work even while they’re reading the time. The Classico beats at a frequency of 21,600 vph (3 Hz) and boasts a 90-hour power reserve. The Classic Fusion Classico Ultra-Thin All Black retails for $18,300.