Hublot has shattered expectations with its latest Square Bang Tourbillon 4-Day Power Reserve, marking a bold departure from the collection’s chronograph heritage while introducing the brand’s first square-cased tourbillon.
This groundbreaking timepiece transforms the familiar Square Bang architecture into something entirely new—a skeletonized masterpiece that reads like a modernist art installation on the wrist.
Geometry In Motion
The 42mm case represents a material innovation breakthrough, crafted from carbon composite woven into precise vertical and horizontal lines. This controlled patterning stands in stark contrast to the typically organic, random textures associated with carbon fiber composites.
Through meticulous production techniques, Hublot has tamed this usually chaotic material into rigid geometric patterns that flow across the case flanks and broad, flat bezel—creating a striking visual narrative of order imposed upon nature.
The skeletonized dial design takes this geometric theme to its logical conclusion, featuring entirely square bridges that create a Mondrian-like composition across the movement. Rather than traditional circular or curved bridge work, these angular elements frame the mechanical components like windows in a modernist building, parceling the intricate movement into digestible visual segments.
The juxtaposition between these rigid square frames and the circular mechanical elements—gear trains, power barrel, and the hypnotic tourbillon—creates compelling visual tension.
Hublot’s designers have strategically positioned four key elements to align with the square case’s cardinal points: the substantial power barrel dominates 12 o’clock, the winding system occupies 3 o’clock, the tourbillon commands 6 o’clock, and the power reserve indicator anchors 9 o’clock. While these elements vary dramatically in size and function, their symmetrical placement creates compositional harmony within the angular framework.
Power Reserve
The heart of this geometric marvel is Hublot’s MHUB6023 caliber, a manually-wound movement that delivers an impressive 96-hour power reserve—hence the “4-Day Power Reserve” designation.
This extended autonomy is particularly noteworthy for a tourbillon-equipped watch, as the constantly rotating escapement typically consumes significant energy. The achievement necessitates the prominent power barrel at 12 o’clock, which stores the substantial energy required for nearly four full days of operation.
Operating at 21,600 vibrations per hour with 25 jewels, the movement represents serious horological engineering wrapped in artistic presentation. The manual winding mechanism adds tactile engagement to the wearing experience, allowing owners to physically connect with the watch’s four-day energy cycle while appreciating the mechanical ballet visible through the square bridge architecture.
The timepiece is completed with a structured rubber strap featuring ceramic and titanium deployant clasp, providing contemporary comfort and security for this substantial investment piece. Water resistance of 30 meters acknowledges the watch’s luxury positioning rather than any sports pretensions.
Priced at £91,000, the Square Bang Tourbillon 4-Day Power Reserve commands serious attention in Hublot’s lineup. While the price point reflects the brand’s luxury positioning and the complexity of creating controlled carbon fiber patterns plus skeletonized tourbillon architecture, the result is undeniably distinctive.
For collectors seeking horological art that challenges conventional round-watch aesthetics, this angular tour de force offers geometric poetry in motion—a timepiece that transforms traditional Swiss watchmaking through the lens of contemporary architectural design.
