Hublot Shaped Square Bang Unico King Gold Blue Ceramic 42mm 821.OL.5180.RX - BRAND NEW Hublot Shaped Square Bang Unico King Gold…

The Hublot Big Bang Unico 821.OL.5180.RX represents one of the most visually arresting expressions of the Big Bang family: a square case silhouette that departs from the round norm while retaining every hallmark of Hublot's Art of Fusion philosophy. Launched as part of the Shaped Square Bang Unico collection, this 42mm piece in King Gold with a blue ceramic bezel and blue index dial is offered here brand new with full box and papers through Bizak & Co.

Hublot's King Gold is a proprietary 18-karat rose gold alloy developed in-house to achieve greater hardness and scratch resistance than standard gold, giving the 42mm case a warmer, deeper hue that ages beautifully and resists the micro-abrasions of daily wear far better than conventional precious metal. The bold, multi-faceted square case architecture is engineered with chamfered lugs and exposed screws that are unmistakably Hublot, translating the iconic Big Bang DNA into a more avant-garde silhouette.

The blue ceramic bezel is one of the defining details of reference 821.OL.5180.RX. Ceramic is prized in fine watchmaking for its extreme hardness and color permanence — unlike anodized aluminum or PVD coatings, the blue hue is intrinsic to the material and will not fade or chip over decades of wear. Against the King Gold case, the contrast is deliberate and dramatic, a color story that sits confidently between sporty and formal.

Powering the watch is Hublot's celebrated Unico movement, the in-house automatic chronograph caliber that gives this collection its name. Visible through the open-worked blue index dial, the movement showcases Hublot's manufacture credentials and allows the wearer a direct view of the skeletonized architecture at work. The rubber bracelet — a signature Hublot touch — provides comfort and flexibility on the wrist while reinforcing the sport-luxury positioning of the piece.

On the wrist, the 42mm square case wears larger and more sculptural than its millimeter count suggests, commanding attention without overwhelming a broad range of wrist sizes. The interplay of King Gold warmth and blue ceramic coolness creates a versatile palette that transitions seamlessly from a boardroom to a weekend escape, making this reference as practical as it is expressive.

Bizak & Co. is proud to offer the Hublot Big Bang Unico 821.OL.5180.RX brand new, complete with original box and papers, ensuring full manufacturer warranty eligibility and complete peace of mind. If you are looking to buy this reference online or would like to discuss it further, our team of specialist advisors is ready to assist — contact us at bizakandco.com for current pricing and personalized service.