A Square Statement: Hublot Square Bang Tourbillon 4-Day Power Reserve
With the new Square Bang Tourbillon 4-Day Power Reserve, Hublot introduces no fewer than four firsts within the collection: a case made entirely of 3D carbon, the omission of a chronograph function, the first tourbillon, and a fully square-constructed movement.
When it was launched in 2022, the Square Bang collection introduced a bold new design language to the Big Bang family, bringing with it a square case as a more assertive alternative. With the Square Bang Tourbillon 4-Day Power Reserve, Hublot now adds a technically ambitious model to the line – one that, for the first time, combines a case made entirely from 3D carbon with a skeletonised dial and the first square-shaped movement of the collection. It also marks the debut of a tourbillon in the Square Bang series and is the first to forego a chronograph in favour of two central hands alone. Let’s take a closer look at the construction and design of the new Square Bang Tourbillon 4-Day Power Reserve.
The 3D Carbon Case
The case of the Square Bang Tourbillon 4-Day Power Reserve stands out through several key features that set it apart from previous models in the line. While its 42 mm diameter remains consistent with earlier editions, Hublot has opted for a slightly slimmer height of 13.2 mm. Notably, this model is the first in the collection to feature a case made entirely from 3D carbon. The name derives from its woven carbon fibre structure, whose vertical and horizontal stripes create a distinctive surface pattern. This is intended not only to produce a visual sense of depth—hence the “3D” in its name—but also to ensure high structural integrity. Another point of distinction is the reduced water resistance, which has dropped to 30 metres, compared with 100 metres for previous models in precious metals and ceramic, or 50 metres for sapphire crystal versions.
The matching square bezel is secured to the central case with six H-shaped titanium screws – a recurring design signature of Hublot. The caseback, too, is made from carbon fibre and features anti-reflective sapphire crystal, offering an unobstructed view of the openworked movement and its distinctive square bridges.
The Skeletonised Dial of the Square Bang
The particular appeal of a skeletonised watch lies in the fact that the wearer can observe the transmission of power within the movement directly through the dial: the energy stored in the mainspring barrel is gradually released, driving the gear train and ultimately reaching the escapement and balance wheel, which regulate the steady rhythm of the watch. In the case of the fully openworked dial on the Square Bang Tourbillon 4-Day Power Reserve, this process becomes a tangible experience. What stands out most is the continuation of the case’s design language within the movement itself: all bridges are either square or rectangular in shape, reflecting the same angular lines that define the outer case. The aesthetic is further enhanced by alternating satin-brushed and matte surfaces that create a distinct sense of depth.
To ensure visual clarity, the movement’s key components are arranged along the four sides of the dial: on the right at 3 o’clock, the winding mechanism transfers the rotational movement of the crown to the oversized mainspring; opposite, at 9 o’clock, sits the power reserve indicator, offering a reading of the watch’s four-day autonomy. At the top, positioned at 12 o’clock, the large mainspring barrel is clearly visible, while the tourbillon mechanism is prominently displayed at the bottom, at 6 o’clock.
The MHUB6023 Manufacture Calibre with Tourbillon
At the heart of the Square Bang Tourbillon 4-Day Power Reserve lies the MHUB6023 manufacture calibre – the first movement within the Square Bang line to have been conceived from the ground up with a strictly square architecture in mind. Whereas previous Square Bang models housed the brand’s round UNICO chronograph calibre, a glance through the caseback of this latest edition reveals that the new calibre is anything but circular. It is built upon a square foundation, with intersecting right-angled bridges that lend the entire watch a coherent, geometrically unified appearance.
The movement is manually wound and offers an extended power reserve of 96 hours – or four days – made possible by the oversized mainspring barrel. The remaining reserve can be read via the indicator on the dial. The tourbillon features a silicon escapement, designed not only to enhance precision, but also to increase resistance to magnetic fields and temperature variations. Beating at a frequency of 21,600 vibrations per hour (3 Hz), the movement operates within the typical range for a tourbillon.
The Strap
The strap of the Square Bang Tourbillon 4-Day Power Reserve is crafted from black rubber and features an embossed pattern that continues the square design language of the watch. A folding clasp made of black ceramic and black-coated titanium ensures a secure and comfortable fit.
Price and Availability of the Hublot Square Bang Tourbillon 4-Day Power Reserve
With its consistent square design – extending from the case and dial to the movement and even reflected in the strap – the new Square Bang Tourbillon is arguably the most visually coherent model in the collection to date. At the same time, with a retail price of €109,000, it is also the most expensive piece within the Square Bang range. Unlike many other Hublot models, however, this watch is not subject to a strict limitation; instead, it joins the brand’s permanent collection as a regular production model.
Norqain’s Wild One Skeleton 42 mm Hakuna Mipaka Limited Edition marks the brand’s latest release in a series of watches created in collaboration with Swiss wildlife ambassador Dean Schneider. This limited edition of 200 pieces was designed in collaboration with industry legend Jean-Claude Biver and combines advanced materials with a charitable cause. Ten percent of…
Jaeger-LeCoultre's recently relaunched 'Master Control' collection features redesigned 40mm watches with open casebacks, sunray brushed silver-white dials and a blue central seconds hand. The watches are now driven by updated calibres integrating various energy-saving enhancements. One of the new iterations is the Jaeger-LeCoultre Master Control Calendar, which features a complete calendar as well as a…
Watches of Switzerland celebrates its centenary with a unique timepiece created in collaboration with independent British watchmakers Craig and Rebecca Struthers. The watch features traditional craftsmanship and a modified Valjoux 90 movement. It is a tribute to the rich heritage of watchmaking and the partnership between retailers and manufacturers. The watch is a one-off piece…
The Geneva-based manufacturer is presenting the TUDOR Pelagos 39, a new addition to its collection of diver's watches. With the new model, the house offers its professional range in a new, more compact form factor. The new Pelagos, however, has a cosmopolitan look with a shiny black sunburst dial. The titanium-cased watch is also equipped…
OMEGA is introducing a new OMEGA Seamaster Diver 300M James Bond Numbered Edition, this time in platinum-gold. The new watch is this year's follow-up from the James Bond 007 Limited Edition Omega Seamaster 2019 edition, introduced to mark the 50th anniversary of the 1969 film On Her Majesty's Secret Service. The new edition celebrates the Swiss…
The Florentine watch brand Panerai presents a new 'Luminor', which takes several of the characteristic Panerai ingredients – the California Dial, the titanium case coated in DLC and the hand-wound mechanical movement with a power reserve of eight days– and combines them with a new cuff strap of supple natural leather. The look of the new Luminor California 8 Days…
Nivada Grenchen has introduced a new version of the Antarctic Diver. The Nivada Grenchen Antarctic Diver Green features a new dial and some minor design updates, but the case and overall specifications remain the same. Throughout the 1950s, 1960s, and 1970s, Nivada Grenchen, a renowned tool-watch brand, released numerous editions of its Antarctic watch. Some…
With its new model the watch manufacture Breguet ties in with a line of ultrathin previous models. As well the new Breguet Classique Tourbillon Extra-Plat Squelette 5395 (Ref. 5395BR/1S/9WU) is equipped with the only 3 mm high calibre 581 made of 18-karat gold including a tourbillon. By skeletonizing the movement the manufacture now makes the mechanical system of…
A. Lange & Söhne is introducing three new LANGE 1 TIME ZONE models. With fifteen years having passed since the launch of the original, the manufacture has decided to equip the 41.9 mm models with the in-house calibre L141.1. As a result, all models of the LANGE 1 watch line originally equipped with the L901…
At LVMH Watch Week 2021, Hublot presented not only the Big Bang Automatic Tourbillon, but also three new models from the Integral range. When the first generation of the model was launched in 2020, Hublot offered a variant with a ceramic case. Now the Swiss manufacturer is expanding the color palette: the Hublot Big Bang…
In 2010 already the Geneva watch manufacture Patek Philippe united sports and technique with the ‘Nautlilus’ collection. Now the brand presented a new model (Ref. 5726/1A-014) of this line on the watch fair Baselworld 2019: A version with stainless steel strap, like the first Nautilus from 1976, and a blue dial with a subtle shading from…
Watchmakers Maximilian Büsser & Friends have released a new watch in the form of two editions – the Horological Machine N°10 Bulldog, inspired by the bulldog. One edition is the Version Ti with a grade 5 titanium case, which is presented on a blue calf-leather strap using Velcro and a titanium buckle. Alternatively, the Version…
Nestled away amongst deep red hearts, gold thorns and shiny green leaves, Louis Vuitton reveals its latest innovative timepiece for women: the amorous Tambour Fiery Heart Automata. With its sparkling diamond-set crown and spinning tourbillon, the automaton timepiece certainly shows Louis Vuitton's La Fabrique du Temps artisanal and watchmaking abilities at their absolute finest. An…