
Hublot Introduces The Square Bang Tourbillon 4-Day Power Reserve
Hublot isn't shy about pushing geometry where most brands tend to settle for tried and true designs. The brand's newest release, the Square Bang Tourbillon 4-Day Power Reserve, marks the first time a tourbillon has appeared in its square-shaped Big Bang line, and this isn't just a matter of fitting an existing movement into a new silhouette. The entire architecture has been redesigned from the ground up, with bridges, layout, and components structured to match the case's square proportions.
Skeletonized movement
The new model runs on the manually wound MHUB6023, a fully skeletonized in-house movement developed specifically for this release. All 174 components are arranged in clean, right-angled symmetry, with square and rectangular bridges finished in a mix of matte and satin surfaces to emphasize depth. At 6 o'clock, the flying tourbillon beats away with a silicon escapement for added resistance to magnetic fields and temperature swings. The large mainspring barrel at 12 o'clock delivers a 96-hour power reserve, tracked by a linear indicator at 9.
Rather than making minor tweaks to existing designs, Hublot has committed entirely to this brand new experimental restructuring. Every primary function is distributed across the watch in unique fashion: winding on the right, power reserve on the left, barrel up top, tourbillon below. The effect is balanced and striking, with each corner contributing visually and mechanically to the watch's function.
Macro view
The 42mm case is made entirely from 3D carbon, a composite material with a vertical and horizontal weave pattern. The strap itself is integrated with Hublot's 'One-Click' quick-release system and finished with a ceramic and titanium deployant clasp. Case thickness comes in at 13.2mm, and water resistance is rated to 30 meters.
The dial is openworked sapphire, offering a full view of the movement suspended within the case. Like the rest of the watch, the design is minimal but sharp, clearly prioritizing architectural impact over dial furniture. For a time-only tourbillon watch, there's a lot to look at.
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