While renowned as a premier jeweller, Harry Winston also produces exceptional haute horlogerie, as demonstrated by this magnificent pocket watch. A piece unique, numbered 1/1, it represents the dazzling culmination of the brand’s decade-long «Histoire de Tourbillon» project, which reimagined the tourbillon in dramatic new forms. Crafted from 18K white gold, this timepiece (including the display holder) is spectacularly set with 273 baguette and emerald-cut diamonds, totalling approximately 27.67 carats of D-F colour and IF-VVS clarity. The openworked dial reveals its breathtaking mechanical heart: four independent tourbillons, each suspended on a distinctive bright blue titanium bridge. A large emerald-cut diamond marks 12 o’clock, while raised numerals indicate the other quarter-hours. This mesmerizing spectacle is driven by a sophisticated, manually-wound movement comprising 95 jewels and 662 components. Accompanied by an equally impressive 18K white gold display holder—adorned with aventurine marquetry and diamonds and echoing the entrance of Harry Winston’s flagship Fifth Avenue store—this lot represents a singular opportunity. It is offered with its original fitted box, certificate, and booklet, presenting a complete and unique work of art for the discerning collector.