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Movement tier: unclassified
Large case: suits wrists 7 in+ (18 cm+)
44 mm case. A bold, statement-size wear. Best suited to larger wrists where the case sits flush.
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Authentication
Big Bangs are among the most counterfeited luxury sport watches; the in-house UNICO column-wheel flyback architecture through the caseback is the definitive check.
Known issues in the market
- Counterfeit Big Bangs are extremely common; fakes universally use ETA 7750 or clones instead of the HUB1242 UNICO.
- Any Big Bang Unico caseback showing a cam-actuated movement or ETA 7750 architecture is counterfeit or has a movement swap.
| Area | What to check | What is correct | Red flag |
|---|---|---|---|
| caseback | UNICO movement architecture | Cal. HUB1242 UNICO with column-wheel flyback architecture visible through caseback | ETA 7750 or cam-actuated movement; definitive counterfeit or swap indicator |
| case | Screw orientation | All visible case screws at the same rotation angle (torqued to a specific position) | Randomly oriented screws; indicates disassembly, counterfeit, or non-factory reassembly |
| dial | Dial printing quality | Crisp multi-layer dial printing; correct font weight on all subdials | Blurry or offset printing; wrong font weight; counterfeit dial |
Common legitimate replacements
- Rubber strap; Hublot OEM recommended.
- Crown; Big Bang crowns subject to wear.
Expert resources: Hublot authentication documentation; Hublot Geneve forums; authorized Hublot service centers.
Authentication guide
Last reviewed June 2026
The Big Bang Unico is one of the most replicated Swiss watches on the market. The in-house UNICO flyback chronograph and the six H-shaped bezel screws are the two fastest authentication anchors.



