The Tonneau Ultrafino Sapphire Pink is a 40 mm automatic flying tourbillon, its case carved entirely from pink sapphire crystal, exposing the movement in full clarity from every angle. Shaped to follow the natural contour of the wrist, it is a watch conceived to be seen as much as worn.
BALANCE OF OPPOSITES
Performance Meets Elegance
Built to withstand 5,000G of shock resistance and rated to 3 ATM, each Bianchet timepiece is engineered to perform. The case, the movement, and the materials are selected with performance in mind, without compromising on the finish or the aesthetics. Thirty hours of hand bevelling go into each caliber, worked to the same standard as the engineering beneath it.
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.
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.
Double Strap
A vulcanized natural rubber strap with a titanium deployant buckle offers an alternative, integrating seamlessly with the case's rubber seam. Both options feature a quick-release mechanism for effortless interchangeability.
