OttantaSei (Exclusive North America Edition) WHILE A MERE GLANCE IS ENOUGH to confirm its membership of the BOVET by Pininfarina family, the Tourbillon OTTANTASEI is bursting with technical innovations and stylistic changes all harmoniously planned around a detailed series of specifications. The word “light”, with its dual connotations of luminosity and limited weight, was the watchword for every stage in the development of this project. This collection, the quantity of movements manufactured will be limited—to just 86 in this case—which the collector can choose to grace with one of the three cases on offer. A plate bearing the individual number of each movement will be meticulously screwed to the back of the case chosen to adorn the watch. OTHER FACTORS that underline the Tourbillon OTTANTASEI’s lineage to the BOVET by Pininfarina watches include the finishes developed and designed specifically for the collection, which magnify the alternating surfaces and volumes of the movement. 34 shades ranging from black to white are used on the various strata that make up the volume of this movement. The same applies to the bipolar Clous de Paris circular décor developed exclusively for the collection’s tourbillons, which is featured here in two sumptuous plates screwed to the barrel bridge. This enchanted journey into the heart of a transparent movement then leads us to the astonishing power-reserve indicator. The barrel engages with a wheel that turns one way or another, depending on whether the watch is being wound or is unwinding during operation. The center of its axis features a feeder screw on which a meticulously polished steel cone moves vertically. When the watch is being wound, the cone travels up the screw and activates a lever against the wall via a ruby runner. The second arm of this lever culminates in a toothed rack that meshes with a pinion located on the axis of the indicator. Thus, during winding, the hand notches up the values it encounters before “spending” them through a reverse movement when the watch is operating, resulting in a precise and unprecedented expression of this invaluable function.