Boucheron Collaborations Ladyhawke Tourbillon. The creative partnership between Boucheron and Girard-Perregaux, initiated in 2007, culminates today in a truly unique piece beating with the famous Tourbillon with three gold Bridges set with diamonds. The Tourbillon itself consists of 72 components for a diameter of one centimetre and a total weight of 0.3 gram, and is entirely hand-decorated and assembled. As for the bird of prey, crafted from solid gold in the High Jewellery workshop at 26, Place Vendôme, it has been fashioned to closely hug the contours of the oval case. Hawke-shaped white gold case set with 833 multicolored diamonds and rubies, 25.3 carats of yellow, pink and white diamonds and rubies. Cabochon crown. Base plate of the movement set with 178 pink, yellow and white diamonds, Bridges angled by hand, Skeleton barrel, Power reserve of 72 hours.