A Measured Take
- The Hublot Big Bang 20th Anniversary King Gold Ceramic (ref. 431.OM.1338.RX) is a 43 mm flyback chronograph in proprietary 18K King Gold and polished black ceramic, powered by the in-house Unico calibre, limited to 250 pieces globally, and awarded the Red Dot Award for Product Design on 7 July 2026 in Essen.
- Production is capped at 250 pieces, priced from 34,900 CHF.
- The in-house MHUB1280.20YEARS calibre delivers a 72-hour power reserve and flyback precision to 1/8th of a second.
- The award recognises twenty years of the Big Bang collection and signals the architecture that will carry the line into its next chapter.

Design and Materials
The Big Bang 20th Anniversary King Gold Ceramic reads as a deliberate layering of contrasts. The 43 mm case is cast in Hublot‘s exclusive King Gold, an 18-karat alloy with elevated platinum content that gives the metal a warmer, deeper tone than conventional red gold. Against it, the polished black ceramic bezel — structured pattern on the flank, six H-shaped titanium screws at the perimeter — draws a sharp boundary between warm metal and cool ceramic. The stamped satin-finished carbon-effect dial deepens that contrast further, its texture absorbing light rather than reflecting it.
The case opens via Hublot’s “One-Click” system, and the crown carries an engraved “20 YEARS” logo, a detail that is restrained rather than promotional. At 13.20 mm thick, the profile is substantial but proportionate to the integrated Unico architecture beneath. Water resistance is rated to 10 ATM / 100 m. On the wrist, the black structured rubber strap with an 18K King Gold and black-plated titanium deployant clasp completes a composition that has remained visually coherent across two decades of iteration.
Movement and Technical Architecture
The MHUB1280.20YEARS calibre is the mechanical centre of this edition, and it carries the full Unico specification. Born in 2010 as Hublot’s first entirely in-house chronograph, the Unico has accumulated five patented innovations: dual oscillating clutches, an anti-trembling system, a zero-friction ratchet wheel blocker, a fine balance wheel adjustment system, and a constant-pressure friction system for the minute counter. The current generation adds a Swiss silicon lever escapement and a front-facing column wheel — both visible through the open architecture and both functional contributors to the 354-component movement’s -2/+4 seconds per day rate.
Power reserve sits at approximately 72 hours. The oscillating weight is 22K King Gold, engraved with “20 Years Hublot Big Bang,” microblasted and circular satin-finished. The main plate and bridges are anthracite ruthenium-plated, visually consistent with the dial’s carbon-effect tone. Hublot’s Chronofiable® protocol governs all performance testing — a process the brand applies across its in-house calibre range, including the Classic Fusion Sage Green and other pieces shown at Watches and Wonders.

Heritage and the Anniversary Context
The Big Bang’s origin in 2005 is well documented: it arrived as a direct continuation of Hublot’s 1980 provocation, when the brand placed a gold case on a natural rubber strap and unsettled the industry’s material conventions. The 2005 Big Bang received the Best Design award at the Grand Prix d’Horlogerie de Genève the same year it launched. The 20th anniversary edition, produced across 2025, reinterprets those founding codes through the contemporary Unico architecture rather than simply reproducing them.
“Design at Hublot starts with a mindset: challenge, refine, reinvent. The Big Bang 20th Anniversary King Gold Ceramic reflects two decades of that discipline, where every material, every line, every movement serves a purpose,” stated Sadry Keiser, Chief Product Officer at Hublot. His statement positions the 250-piece limited edition not as a retrospective but as a transition point: the Big Bang Original Unico, described as more integrated and more architectural, follows directly from it in 2026.
Collector Position and What Follows
A 250-piece global allocation at 34,900 CHF places this edition firmly within the collector tier of the Big Bang range. The Red Dot Award, judged by an international jury of design experts in Essen, adds institutional recognition to a piece that already carries anniversary significance. For GCC collectors who have followed the Big Bang’s trajectory, this edition sits between two eras: it closes the anniversary chapter and signals the architectural direction of the Big Bang Original and the Big Bang Reloaded, both announced for 2026.
Hublot’s updated warranty structure, introduced in 2026, also applies to eligible timepieces purchased from January 2026, offering a five-year basic warranty with the possibility of an additional five-year extension through the Hublotista programme. For a limited edition intended to hold value over time, that extended coverage is a concrete addition to the ownership proposition.

Specifications
| Reference | 431.OM.1338.RX |
| Movement | MHUB1280.20YEARS — Unico Manufacture self-winding flyback chronograph, column wheel, silicon escapement, 354 components, 43 jewels, 4 Hz |
| Power Reserve | Approx. 72 hours |
| Case Size | 43 mm diameter, 13.20 mm thickness |
| Case Material | 18K King Gold with polished black ceramic bezel; 6 H-shaped titanium screws |
| Water Resistance | 10 ATM / 100 m |
| Edition | Limited to 250 pieces |
| Price | 34,900 CHF / 39,900 EUR / 40,100 USD / 33,000 GBP |
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| Movement | MHUB1280.20YEARS — Unico Manufacture self-winding flyback chronograph with column wheel, silicon lever escapement, 354 components, 43 jewels, 4 Hz (28,800 A/h) |
| Case size | 43 mm diameter, 13.20 mm thickness |
| Case material | 18K King Gold with polished black ceramic bezel; 6 H-shaped titanium screws; sapphire crystal caseback with anti-reflective treatment |
| Water resistance | 10 ATM / 100 m |
| Price | 34,900 CHF / 39,900 EUR / 40,100 USD / 33,000 GBP; limited edition of 250 pieces |
Frequently Asked Questions
What is the Hublot Big Bang 20th Anniversary King Gold Ceramic and what makes it significant?
The Hublot Big Bang 20th Anniversary King Gold Ceramic (reference 431.OM.1338.RX) is a limited edition of 250 pieces that marks two decades of the Big Bang collection. It combines Hublot's exclusive King Gold alloy with a polished black ceramic bezel and the in-house Unico flyback chronograph movement, and it received the Red Dot Award for Product Design in 2026.
What movement powers the Big Bang 20th Anniversary King Gold Ceramic?
The watch is powered by calibre MHUB1280.20YEARS, Hublot's Unico manufacture self-winding flyback chronograph. It features a front-facing column wheel, Swiss silicon lever escapement, a power reserve of approximately 72 hours, accuracy of -2/+4 seconds per day, and five patented innovations across its 354 components.
How much does the Hublot Big Bang 20th Anniversary King Gold Ceramic cost, and is it a limited edition?
The timepiece is priced at 34,900 CHF, 39,900 EUR, 40,100 USD, or 33,000 GBP. Production is limited to 250 pieces globally, making it a collector-grade release within the Big Bang anniversary chapter.
What is King Gold, and why does Hublot use it?
King Gold is Hublot's proprietary 18-karat gold alloy incorporating enhanced platinum content, which produces a warmer, richer colour than standard red gold. It is developed in-house at La Manufacture as an expression of the brand's material innovation philosophy.
How does the Big Bang 20th Anniversary compare to the next generation of the Big Bang collection?
The 20th Anniversary edition reinterprets the original Big Bang design codes through the contemporary Unico architecture, described by Chief Product Officer Sadry Keiser as the foundation for the next chapter: the Big Bang Original Unico, which is characterised as more integrated, more architectural, and more essential.


