A dealer's breakdown of Big Bang reference numbers, sizes, production eras and how to tell one variant from the next.
The Big Bang launched in 2005 and became the watch that rebuilt Hublot around Jean-Claude Biver's "Art of Fusion" idea: combining ceramic, gold, titanium, rubber and carbon in a single case. Two decades later the catalog is deep, and the reference numbers carry all the information you need to identify what you are actually looking at.
Every Big Bang reference follows a fixed pattern: three digits, then case material, then a dial code, then a strap code, with an optional suffix for limited or special editions. Take 411.CI.1190.LR.ABR14. The 411 marks the case family, CI is the case material (black ceramic), 1190 is the dial specification, LR is the strap (leather), and ABR14 flags a special edition. On 301.PM.1780.RX, the 301 is the original 44mm chronograph family, PM is rose gold, 1780 is the dial, and RX is a rubber strap. Learn the material letters and you can read most of a watch's spec before you ever see the caseback.
Common material codes: CI black ceramic, CM matte ceramic, NX titanium, SX steel, PM rose gold, OX or OM King Gold. Strap codes include RX rubber and LR leather.
The leading digits tell you size and generation. The 301 family is the founding 44mm automatic chronograph, running the HUB4100 movement built on a Valjoux base with a chronograph module, roughly 42 hours of reserve. The 341 family shrinks the same design to 41mm. Ladies and mid-size models sit in the 361 and 38mm ranges.
The big shift came with the 411 family, the Big Bang Unico at 45.5mm. This is where Hublot moved to its in-house HUB1242 Unico movement: a column-wheel flyback chronograph with a date at three, dual clutch, and around 72 hours of power reserve. The 441 family carries the Unico caliber in a 42mm case for buyers who find 45mm too aggressive. King Power references push past 48mm and are a separate, chunkier line often confused with the Big Bang proper.
Think of the Big Bang in two broad eras. The first, 2005 to roughly 2013, is the modular era built around the 301 and 341 families and the HUB4100. These watches feel more traditional inside, with the sandwich case construction, H-shaped titanium screws on the bezel, and the porthole silhouette that defined the launch.
The second era begins in 2013 with the Unico. Look for the exhibition caseback showing the in-house movement, the flyback function, and a cleaner date display. If a Big Bang shows its own manufacture caliber through the back and carries a 411 or 441 reference, it is a Unico. If the back is closed or shows a modular chronograph and the reference starts 301 or 341, it is the earlier generation. That single distinction resolves most identification questions.
Bezel construction is a reliable era and grade marker. The classic six H-shaped screws sit on the bezel of most Big Bangs; on genuine pieces they are functional titanium and align cleanly. Dial codes in the reference tell you the finish. The 301.PM.1780.RX pairs rose gold with a black carbon fiber dial and a ceramic bezel, a combination that shows the Art of Fusion approach clearly: precious metal case, technical dial, ceramic bezel, rubber strap. The 411.CI.1190.LR.ABR14 runs a black standard dial and a black ceramic bezel in an all-black ceramic case, a stealthier and more uniform look.
Material choice drives both price and wear. Ceramic resists scratches and holds its finish for years but is heavier and can chip on a hard impact. Rose gold and King Gold carry higher intrinsic value and patina differently. Titanium keeps a 45mm case wearable on the wrist.
We currently hold three Big Bangs spanning roughly $9,100 to $19,300, and two illustrate the range well. The Big Bang Unico 45.5mm in Black Ceramic (411.CI.1190.LR.ABR14) is the in-house flyback generation on a leather strap, a good entry into the Unico caliber. The Big Bang 44mm Rose Gold (301.PM.1780.RX) represents the founding chronograph family with a carbon fiber dial on rubber, the classic gold-and-technical pairing that built the model's reputation.
Before buying, confirm the reference on the caseback matches the papers, check that all six bezel screws are present and true, and verify the strap is Hublot's own quick-change fitting. On Unico models, run the flyback and confirm the date snaps cleanly. On gold references, weight and hallmarking should match the metal claimed.
Big Bang values are steadier on precious-metal and limited editions than on standard steel or ceramic pieces, which see the sharpest depreciation from retail. Unico references generally hold better than the earliest modular chronographs because of the in-house movement. Buy the material and generation you actually want to wear; that is where the money stays.
Live inventory for this model — updated continuously as pieces arrive and sell.
