The Rotondo Ultrafino Gold is a 39 mm automatic flying tourbillon, its case and bracelet crafted entirely in 18k gold. Its sharp edges and clean bezel in deliberate contrast with the open-worked movement within, worn with the weight and presence of something built to last generations.
Performance Meets Elegance
Bianchet produces tourbillon timepieces exclusively. Not as a complication added to a watch, but as the watch's founding reason for existence. Every calibre is an in-house flying tourbillon, conceived, developed, and assembled in La Chaux-de-Fonds. The tourbillon is not the feature. It is the philosophy.
IN-HOUSE FLYING TOURBILLON
Ultra-Thin Automatic Flying Tourbillon
This calibre is a true in-house creation, developed from the ground up to express Bianchet’s vision of the ultra-thin automatic flying tourbillon. The movement was conceived as a complete architecture, where every component serves a clear purpose: reducing thickness, improving efficiency, and maintaining long-term stability.
Several key components are machined in-house, giving full control over tolerances and finishing. It is what allows each mechanism to be shaped according to its original concept, with a consistency and precision that define the Maison's mechanical identity.
Flying Tourbillon
At the core of this architecture, the regulating system adheres to the principles of flatness and efficiency. The mechanism features a flying flat tourbillon, which is driven laterally by a toothed pallet bridge. To further minimize thickness, the pallet fork and the anchor have been combined into a single component within the escapement.
Gear Train
The gear train is arranged laterally to free the central area for the regulating system. The eight-day wheel ensures the great wheel and barrel remain aligned at a uniform level, mitigating transmission fluctuations.
This geometric configuration allows minor discrepancies to counterbalance one another, maintaining a stable energy flow toward the escapement
Barrel
At the core of the movement lies a flying barrel, the ratchet wheel integrated directly into the drum, eliminating unnecessary layers and allowing the barrel cover to drive the gear train.
The result is a more compact architecture that optimizes energy transfer through fewer stacked components.
Automatic Winding
The caliber uses an angular transmission system with frontal toothing, thereby enhancing energy transfer efficiency throughout the mechanism.
The automatic winding is unidirectional and reinforced with anti-reversal gears, ensuring that rotor movement directly contributes to the winding of the mainspring.
