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Top-tier supplier movement
Medium-large: suits wrists 6.5 in+ (16.5 cm+)
40 mm case. Wears confidently on average to larger wrists. May overhang on slender builds.
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Authentication
The Compax two-pusher three-register configuration must match the original vintage UG Compax layout; verify against original UG Compax dial documentation.
Known issues in the market
- The re-edition dial must replicate original Compax configuration; any deviation from the two-pusher, three-register layout is a wrong model or non-genuine dial.
- The ETA 2894-2 base with column wheel is the correct movement; any other architecture is a discrepancy.
| Area | What to check | What is correct | Red flag |
|---|---|---|---|
| dial | Two-pusher three-register Compax configuration | Two pushers and three registers consistent with original UG Compax layout | Incorrect pusher count or register layout; wrong model or non-genuine dial |
| movement | ETA 2894-2 base with column wheel through caseback | ETA 2894-2 architecture with column-wheel chronograph mechanism | Non-2894-2 architecture; different configuration or movement swap |
| caseback | Universal Geneve serial and Compax reference | UG serial and Compax reference correctly engraved | Missing or incorrect engravings; non-genuine caseback |
| dial | UG font and logo consistency with vintage archives | Font and logo match original UG Compax documentation | Incorrect font or logo; non-genuine dial |
Common legitimate replacements
- Crown; Universal Geneve OEM only.
- Crystal; sapphire standard.
Expert resources: Universal Geneve authorized service; UG archives for Compax dial layout reference.
Authentication guide
Last reviewed June 2026
The Compax and Tri-Compax are UG's most collected vintage chronographs. The Tri-Compax has three registers (running seconds, 30-minute counter, 12-hour counter). The column-wheel movement is the authentication foundation for both.
Sources: OnTheDash Compax/Tri-Compax reference database; Christie's and Phillips auction records for UG Tri-Compax.





