Greubel Forsey Quadruple Tourbillon A Differentiel Watch

The Greubel Forsey Quadruple Tourbillon A Differentiel watch perpetuates the reputation of this exclusive brand for haute horlogerie of the highest innovation and craftsmanship. Presented in an asymmetric form, this platinum watch incorporates a world premiere mechanical movement with four tourbillons, paired in two double-tourbillon cages, each comprised of 128 parts. This extremely complex and ingenious system of paired tourbillons is designed to offer performance advantages over traditional tourbillons, which compensate for gravity's influence only in the vertical position. The inner tourbillon is inclined at a 30-degree angle and completes a single revolution each minute, while the outer tourbillon revolves once every four minutes. In addition to these complications, the watch also showcases a power reserve indicator, and a small seconds display.

In the manner of all Greubel Forsey creations, the Quadruple Tourbillon A Differential watch showcases exceptional attention to matters of finish and execution. Each of the 531 parts in the movement are finished by hand; jewels are olive-domed and set in countersinks, and the free-sprung balance wheels are fitted with a Phillips-curve hairspring and white gold meantime screws. Mainplates are made from nickel silver, and the dial-side tourbillon bridges are crafted from sapphire. The steel tourbillon bridges, visible from the movement side, have been finished with anglage and a rich black polish. Rapidly rotating twin mainspring barrels assure a power reserve of 50 hours.

The Greubel Forsey Quadruple Tourbillon A Differentiel watch is fitted with a black alligator leather strap, and a folding clasp engraved with the Greubel Forsey initials; gold is employed to craft the dial, applied hour markers, and the skeletonized hands. Water resistance of this rare timepiece is rated at 30 meters.