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Harry Winston introduces the latest high-end horological that is Histoire de Tourbillon 4. In this fourth series of Histoire de Tourbillon, Harry Winston celebrates the most revered horological complication with a tri-axial tour billon, contained within three concentric cages, each of which rotates not only at a different speed, but also at a different angle with respect to the other cages, to neutralize the effect of gravity. Composed of 345 parts, this extremely sophisticated movement ensures superb performance and split-second accuracy, making Histoire de Tourbillon 4 one of the most complex mechanical timekeepers ever made.