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Hublot Shaped Square Bang Unico King Gold Ceramic 42 mm 821.OM.0180.RX

Hublot Shaped Square Bang Unico King Gold Ceramic 42 mm 821.OM.0180.RX Hublot Shaped Square Bang Unico King Gold…

Reference 821.OM.0180.RX

Full watch configuration

Hublot Shaped Square Bang Unico King Gold Ceramic 42 mm 821.OM.0180.RX

$34,299.00
Requested accessories
Full Set

By Hublot

Sourced to order. We confirm the watch, condition and final price before purchase. Reference images shown.

Eligible watches: 90-day returns for store credit only. Brand-new watches and other exclusions are final sale. Return terms.

Hublot Shaped Square Bang Unico King Gold Ceramic 42 mm 821.OM.0180.RX

Hublot Shaped Square Bang Unico King Gold Ceramic 42 mm 821.OM.0180.RX

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Hublot Shaped Square Bang Unico King Gold Ceramic 42 mm 821.OM.0180.RX

Catalogue watch price: $34,299.00 USD

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The Hublot Square Bang Unico 821.OM.0180.RX is a 42mm shaped chronograph built on an 18k rose gold King Gold case, featuring a striking open-worked skeleton dial framed by a ceramic bezel and worn on a rubber strap. This reference represents one of Hublot's boldest departures from the round case format, marrying the brand's signature fusion of materials with an architectural square silhouette that commands instant attention on the wrist.

Reference 821.OM.0180.RX stands out for its rare combination of warm King Gold, cool ceramic, and the visual drama of a fully skeletonized movement visible through the dial — a collector-grade piece that is equally at home at a black-tie event or a weekend gallery opening. Contact Bizak & Co. today to purchase this Hublot Square Bang Unico at the best price and experience our white-glove service.

Compare it across every Big Bang Square Bang Unico reference we carry, or browse the full Hublot collection at Bizak & Co.

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The Hublot Square Bang Unico 821.OM.0180.RX is the definitive statement from Geneva's most daring manufacture: a 42mm square-cased chronograph that fuses precious King Gold, high-tech ceramic, and skeleton watchmaking into a single unmistakable object. Since Hublot introduced the Big Bang family in 2005, the brand has continuously pushed the geometry and material vocabulary of luxury sports watches, and the Square Bang line — launched as the squared evolution of the round Big Bang — represents the apex of that ambition.

The case of reference 821.OM.0180.RX is crafted in Hublot's proprietary King Gold, an 18k rose gold alloy developed in-house to deliver a richer, deeper hue and superior scratch resistance compared to conventional rose gold. At 42mm, the square case wears with the confident presence of a large round watch while offering a distinctly contemporary, almost architectural footprint on the wrist. The combination of polished and satin-brushed surfaces across the case flanks catches light from multiple angles, ensuring the piece never looks static.

The ceramic bezel is integral to the Square Bang's identity. Crafted from sintered zirconium oxide — the same material used in high-performance engineering — it provides exceptional hardness and a cool, matte-black contrast against the warm golden case, a textbook example of Hublot's Art of Fusion philosophy. The rubber strap continues that philosophy, offering a luxurious yet sport-ready wearing experience and a secure, comfortable fit that invites daily wear without reservation.

Through the skeleton dial, the movement is fully exposed, transforming the watch's face into a mechanical theatre. Index hour markers are positioned around the perimeter to ensure legibility while the open architecture reveals bridges, wheels, and the Unico chronograph mechanism working in concert. The Unico caliber is the manufacture's flagship self-winding chronograph movement, developed and produced entirely in-house in Nyon, Switzerland, and is celebrated for its column-wheel lateral-clutch flyback chronograph mechanism — a complication that elevates this reference well beyond a dress piece into genuine haute horlogerie territory.

Owning the 821.OM.0180.RX means owning one of Hublot's most coveted and technically accomplished references: a shaped case, a precious-metal alloy, a high-tech bezel material, and an in-house skeleton chronograph movement, all delivered with full manufacturer packaging. For collectors who want a watch that breaks convention without sacrificing craftsmanship, this is the reference to own.

At Bizak & Co., we offer the Hublot Square Bang Unico 821.OM.0180.RX at the best price, backed by our reputation for transparency, expertise, and personalized service. Whether you are buying your first Hublot or adding a cornerstone piece to an established collection, our team is ready to guide you through every step. Reach out today to buy online or speak with a specialist — we make acquiring extraordinary timepieces effortless.

Technical Details
Reference
821.OM.0180.RX
Model
Big Bang Square Bang Unico
Movement
Automatic
Case material
Rose Gold
Bracelet material
Rubber
Dial
Skeleton with index hour markers
Case size
42mm
Requested accessories
Full Set
FAQ

1. What makes the Hublot Square Bang Unico 821.OM.0180.RX special?
Reference 821.OM.0180.RX combines three of Hublot's most prized elements — a King Gold case, a ceramic bezel, and a skeletonized in-house Unico chronograph movement — inside a bold 42mm square case. This fusion of precious metal, advanced ceramic, and open-worked haute horlogerie makes it one of the most technically and aesthetically ambitious references in Hublot's catalog. It is simultaneously a luxury dress watch and a high-performance chronograph.

2. What movement powers the Hublot Square Bang Unico 821.OM.0180.RX?
The 821.OM.0180.RX is powered by Hublot's in-house Unico automatic chronograph caliber, developed and manufactured entirely at the brand's facility in Nyon, Switzerland. The Unico is renowned for its column-wheel lateral-clutch flyback chronograph mechanism, which is visible through the skeleton dial. It is widely regarded as one of the most significant in-house developments in Hublot's history.

3. What is the case size of the Hublot Square Bang Unico 821.OM.0180.RX?
The Hublot Square Bang Unico 821.OM.0180.RX features a 42mm square case crafted in King Gold, Hublot's proprietary 18k rose gold alloy. The square geometry means the lug-to-lug presence differs from a conventional round 42mm watch, giving it a bold architectural footprint on the wrist. It is designed to make an unmistakable visual statement.

4. Is the Hublot Square Bang Unico 821.OM.0180.RX suitable for everyday wear?
Yes — despite its precious King Gold case and haute horlogerie credentials, the Square Bang Unico is built for real-world use. The ceramic bezel is highly scratch-resistant, and the rubber strap provides comfort and durability for daily wear across a wide range of activities and dress codes. It transitions effortlessly from boardroom to weekend.

5. What are the key materials and dial details of the 821.OM.0180.RX?
The case is machined from King Gold, an in-house 18k rose gold alloy developed by Hublot for enhanced hardness and a richer tone. The bezel is black ceramic, offering a striking contrast to the warm gold, and the dial is a full skeleton design with index hour markers that maintain legibility while showcasing the movement beneath. The watch is completed by a rubber strap.

6. How can I buy the Hublot Square Bang Unico 821.OM.0180.RX from Bizak & Co.?
Bizak & Co. offers the 821.OM.0180.RX at the best price, and you can purchase it directly through bizakandco.com or by contacting our specialist team. We provide a personalized, white-glove experience whether you are buying online or prefer to speak with an advisor. Reach out today and we will guide you through the purchase and answer any questions about this exceptional Hublot.

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Eligible watches may be returned within 90 days for store credit. Brand-new watches and other exclusions are final sale.

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U.S. overnight shipping is $100; international shipping is $500. Dispatch takes 2–3 business days after your wire clears. International transit times vary. Shipping details.

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