Hublot Big Bang Original Unico King Gold Ceramic 43mm Black Dial 431.OM.1380.RX

The Hublot Big Bang Original is the watch that defined a generation of bold, avant-garde horology when it debuted in 2005. Founder Jean-Claude Biver's vision of fusing seemingly incompatible materials — precious metals with rubber, ceramic with gold — upended Swiss watchmaking convention and created an entirely new aesthetic language. The Big Bang Original quickly became one of the most recognizable and coveted luxury sport watches in the world, worn by athletes, artists, and collectors who demand presence on the wrist without sacrificing craftsmanship.

Reference 431.OM.1380.RX represents one of the most compelling expressions of that vision. The 43mm case is constructed from Hublot's proprietary King Gold — an 18-karat rose gold alloy developed in-house and enriched with platinum to deliver a deeper, more enduring color that resists fading far better than standard rose gold — combined with high-tech ceramic components that bring exceptional hardness and a refined matte contrast to the overall silhouette. The result is a case that feels both opulent and indestructible.

The dial is finished in black and populated with a combination of indexes and Arabic numerals, a signature Big Bang layout that maximizes legibility while retaining a bold, sporty character. The ceramic bezel is fastened with the iconic six H-shaped screws that have become a hallmark of the Big Bang DNA, giving the watch its instantly recognizable industrial edge. Every detail, from the open-worked architecture visible through the sapphire crystal to the integrated rubber strap, reinforces Hublot's Art of Fusion ethos.

Powering the 431.OM.1380.RX is an automatic Unico movement, Hublot's celebrated in-house flyback chronograph caliber. Developed entirely within Hublot's manufacture, the Unico is constructed on a column-wheel architecture and features a lateral clutch, offering smooth, precise chronograph operation. The movement's architecture is partially visible through the exhibition caseback, inviting appreciation of the intricate mechanical choreography within. The rubber strap is not merely a style choice — it is supple, lightweight, and engineered for comfort across long periods of wear, making this watch as practical as it is visually commanding.

On the wrist, the Big Bang Original Unico 431.OM.1380.RX projects unmistakable confidence. At 43mm it fills the wrist authoritatively without crossing into unwearable territory, and the interplay of warm King Gold tones against the cool black ceramic and dial creates a depth and sophistication that rewards close inspection. This is a watch equally at home at a black-tie event as it is at a weekend retreat, embodying the versatile luxury sport watch category that Hublot helped to pioneer.

At Bizak & Co. we source this reference brand new, ensuring you receive a completely unworn example ready for immediate delivery. Our team of specialists offers transparent, competitive pricing and personalized service whether you are buying your first Hublot or adding a cornerstone piece to an established collection. Browse reference 431.OM.1380.RX on bizakandco.com or reach out directly — we are here to make your purchase seamless, confident, and rewarding.