The Jacob & Co. Brilliant Flying Tourbillon Baguette Pastel Arlequino takes the brand’s high-jewelry watchmaking somewhere genuinely unusual. Jacob & Co. describes the timepiece as featuring the first diamond-set balance wheel in modern watchmaking, placing 54 brilliant-cut white diamonds directly onto one of a mechanical movement’s most critical regulating components.

Priced at $693,000 and created as a Pièce Unique, the Jacob & Co. Brilliant Flying Tourbillon Baguette Pastel Arlequino pairs that diamond-set balance wheel with a one-minute flying tourbillon, 366 pastel baguette-cut sapphires and the new self-winding JCFA02 caliber. The result is undeniably extravagant, but the watch is more interesting than another exercise in covering a complicated movement with gemstones because the jewelry treatment extends directly into the mechanics responsible for keeping time.

A 54-Diamond Balance Wheel Is the Main Event

According to Jacob & Co., the concept began during an R&D meeting with a question about what would happen if diamonds were introduced to one of a movement’s most important regulating components. Turning that idea into a functioning watch meant addressing something considerably more complicated than simply finding room for additional stones.

A mechanical watch’s balance wheel works alongside the hairspring to regulate the movement, making its weight, balance and distribution critical to performance. For the Jacob & Co. Brilliant Flying Tourbillon Baguette Pastel Arlequino, 54 brilliant-cut white diamonds are set directly onto that oscillating component while allowing it to continue performing its mechanical purpose.

The balance wheel operates at 3Hz while the flying tourbillon completes one revolution every 60 seconds. As both mechanisms move, the diamonds continuously change their relationship with the surrounding light, producing what Jacob & Co. describes as the appearance of a luminous halo in motion.

That visual effect helps explain why the diamond-set balance wheel matters beyond the bragging rights. Jacob & Co. has effectively transformed one of the movement’s functional components into part of the watch’s show, making the mechanics and jewelry difficult to separate from one another.

366 Pastel Sapphires Create the Arlequino Look

The rest of the Jacob & Co. Brilliant Flying Tourbillon Baguette Pastel Arlequino is considerably less restrained. Its 42mm case is crafted from 18K white gold, while the case and dial are invisibly set with a total of 366 pastel baguette-cut sapphires arranged in contrasting shades of green, blue, lavender and pink alongside white diamonds.

Rather than arranging the gemstones into a conventional gradient, Jacob & Co. uses distinct areas of color to create the watch’s patchwork appearance. That composition provides the inspiration for the Arlequino name, a reference to Arlecchino and the colorful geometric costume traditionally associated with the character from Italian commedia dell’arte.

The combination gives the watch a noticeably different personality from the monochromatic diamond pieces normally associated with high jewelry. Each color retains its own presence while the arrangement creates a larger pattern across the case and dial, surrounding the mechanical display at the center of the watch without completely overpowering it.

Rhodium-finished leaf hands handle the actual timekeeping display, although traditional legibility clearly shares the stage with spectacle here. Between the pastel sapphires, flying tourbillon and constantly moving diamond-set balance wheel, the Pastel Arlequino is designed to reward looking at the watch even when knowing the time is completely beside the point.

Inside the Jacob & Co. Brilliant Flying Tourbillon Baguette Pastel Arlequino

Powering the Jacob & Co. Brilliant Flying Tourbillon Baguette Pastel Arlequino is the brand’s new self-winding JCFA02 caliber, which combines the flying tourbillon with a micro-rotor. The movement operates at 21,600 vibrations per hour and provides approximately 72 hours of power reserve, giving the watch enough autonomy to remain running through most of a weekend away from the wrist.

Using a micro-rotor also allows Jacob & Co. to maintain an automatic winding system without placing a large conventional rotor across the back of the movement. That matters on a watch where the mechanical architecture is part of the visual experience, especially because the decoration continues when the Brilliant Flying Tourbillon is turned over.

The Jacob & Co. Brilliant Flying Tourbillon Baguette Pastel Arlequino’s movements bridges are set with a further 234 brilliant-cut white diamonds, echoing the 54 stones attached to the balance wheel on the dial side. It reinforces the idea that the gemstones are not simply a decorative layer placed over a complicated watch; Jacob & Co. has designed the movement and gem setting to operate as parts of the same composition.

The Jacob & Co. Brilliant Flying Tourbillon Baguette Pastel Arlequino Is a One-of-One

Jacob & Co. created the Brilliant Flying Tourbillon Baguette Pastel Arlequino as a Pièce Unique rather than a numbered limited edition, meaning only one example exists. At $693,000, that exclusivity places the watch firmly within the brand’s most elaborate combinations of high jewelry, mechanical complication and extreme craftsmanship.

Plenty of luxury watches use precious stones to create spectacle, but the Pastel Arlequino makes a stronger argument than simply increasing the carat count. The decision to apply 54 diamonds to the balance wheel means one of the movement’s most important working components becomes part of the jewelry itself, while the flying tourbillon keeps the entire display in near-constant motion.

At nearly $700,000, practicality was never supposed to be the point. The Jacob & Co. Brilliant Flying Tourbillon Baguette Pastel Arlequino instead demonstrates what can happen when traditional mechanical watchmaking, high jewelry and a fairly ridiculous engineering question are all allowed to collide inside the same 42mm case.

Via Jacob & Co.