Knowledge Center

Professional Authentication Platform

Log InRegister

Case

Layered sandwich case

Probable

The Big Bang case is built as a stack — bezel, gasket, case body, back — screwed together with the construction visible from outside. That is unusual and it is an advantage for an examiner: the tolerances a counterfeiter must hit are on display rather than hidden behind a caseback, so layer alignment, gasket compression and edge finishing can all be judged without opening anything.

Part reference

Brand
Hublot
Material
Combinations of steel, titanium, ceramic, carbon composite, sapphire and gold alloys
Identifying marks
Layer edges parallel and evenly spaced all the way round; the gasket uniformly compressed with no bulging or waviness; brushed and polished surfaces meeting in clean boundaries across the different materials, which is harder than it looks because the materials take finishing differently.

Documented variations

Classification

FactoryDocumented as shipped from the factory for this reference and period.PeriodNot original to this watch, but correct for its production period.ServiceFitted by the manufacturer's own service network. Not a defect.AftermarketThird-party part. Affects originality, not authenticity.ModifiedGenuine parts in a configuration the factory did not sell. Affects originality and value, not authenticity.CounterfeitDeceptive reproduction intended to pass as genuine.UnknownEvidence on file does not settle the question.

  • Material substitution

    CounterfeitProbable

    Whole production

    Where a case is claimed as ceramic, carbon or sapphire, the claim is testable without equipment: those materials differ from steel in weight and in how quickly they take heat from the hand. A ceramic case that warms like metal is not ceramic. This is one of the few material claims in the catalog that an examiner can check in the room.

Documented on these references

Provenance of this record

Sources & Evidence

Primary sourceTechnical documentation

Technical literature on watch-case ceramics, composites and sapphire

Materials and horological technical literature

Accessed
2026-08-18

Cited for

This referenceHigh confidence
Secondary sourceCollector research

Hublot collector and market research on counterfeits and reference structure

Collector communities and specialist dealers

Accessed
2026-08-18

Cited for

This referenceProbable

Last verified: Not yet reviewed