Big Bang bezel with six H-headed screws

Probable

Six screws with H-shaped heads pass through the bezel and secure it to the case, and on genuine production they are ALIGNED — every H reading the same way round. They are real fasteners doing real work in a case that is assembled in layers rather than closed.

Part reference

Brand: Hublot
Material: Steel, ceramic, titanium or gold according to reference
Introduced: 2005
Identifying marks: All six H heads oriented identically, cleanly cut, seated flush, and finished to the same standard as the bezel around them. The gasket visible between the case layers is evenly compressed with no waviness. Layer edges meet in crisp, parallel lines.

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.

Aligned, correctly finished screws
FactoryProbable
Whole production
Correct. Alignment is the part that is hard — the head shape is trivial to copy and the consistent orientation across six fasteners is a manufacturing discipline. Misaligned, burred or unevenly seated heads are among the most reliable indicators against a Big Bang case.
Screws disturbed at service
ServiceProbable
Whole production
The screws are functional, so a case opened for service may have them re-seated slightly differently. Minor variation after a documented service is a service observation and not a finding — which is why alignment should be read together with the finishing rather than alone.

Documented on these references

Hublot 421.NX.1170.RXFactory
Whole production
Hublot 301.SX.130.RXFactory
Whole production
Check that all six H heads read the same way round. Alignment is the hard part; the head shape is trivial to copy.

Provenance of this record

Sources & Evidence

Primary sourceManufacturer documentation

Hublot — collection, material and caliber specifications

Hublot SA

Accessed: 2026-08-18

Cited for

This referenceProbable

View source ↗

Secondary sourceCollector research

Hublot collector and market research on counterfeits and reference structure

Collector communities and specialist dealers

Accessed: 2026-08-18