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Authentication
The deeply engraved Constellation star on the caseback is the single most reliable authentication marker; a flat stamped star indicates a non-genuine or replacement caseback.
- Counterfeit Constellation casebacks have a flat stamped star rather than a deeply engraved one; the relief should be felt with a fingernail.
- The integrated claw lug tips are thin and crack under prying; inspect for any cracking at the claw tips under a loupe.
- The integrated bracelet on Constellation models is Omega-specific; any non-Omega integrated bracelet is an incorrect replacement.
| Area | What to check | What is correct | Red flag |
|---|---|---|---|
| caseback | Star medallion relief | Star deeply engraved with relief felt under fingernail pressure, sharp star-point edges | Flat stamped star with no tactile relief; star with rounded points indicating wear or a cast fake |
| case | Claw lug tips | Claw tips intact with no cracking, sharp edge at the tip consistent with factory finish | Cracked or chipped claw tips; any claw tip that shows a stress fracture under loupe examination |
| bracelet | Integrated bracelet identity | Omega-specific integrated bracelet with signed deployant clasp, correct link taper toward the clasp | Non-Omega integrated bracelet; any bracelet without Omega signed clasp |
- Integrated bracelets are a known replacement target on Constellation models; confirm the clasp is Omega-signed.
- Claw lug damage is common on previously owned examples; any repair welding at the claw tips affects value.
Authentication guide
The modern Constellation is defined by its four "claw" elements holding the sapphire crystal to the case, and the applied star at 6 o'clock. Cal. 8501 is Co-Axial Master Chronometer. The claws are a casting element -- they are part of the case, not applied accessories, and their geometry is precise.




