Live pricing is coming soon. Get notified when it is available for this reference.
Community + OSINT signals haven’t landed for this reference yet. We don’t publish a rating against zero signal — the number would mean nothing. Editorial body + caliber + market value still surface above; ratings appear once the signal corpus does.
The Urban Jurgensen 2340 Tourbillon is one of the rarest independent tourbillons produced today. Authentication requires examination of the flying tourbillon at 6 o'clock, provenance documentation, and ideally inspection by a specialist with direct UJ tourbillon experience.
| Area | What to check | What is correct | Red flag |
|---|---|---|---|
| movement | Flying tourbillon rotation at 6 o'clock | Tourbillon cage completes exactly one revolution per minute; the motion is smooth and consistent; the bridge holding the cage is a single cantilever (flying design, no upper jewel) | Tourbillon stopped or irregular; visible upper jewel or bridge above the cage (non-flying design); rotation rate other than one per minute |
| movement | Hand-finishing matching Cal. 9 specification | Same anglage, perlage, and straight-grained finishing as other UJ calibers; the tourbillon cage itself should be chamfered and polished | Machine-regular finishing on the cage or bridges; unfinished edges anywhere in the visible movement |
The Urban Jürgensen 2340 Tourbillon is the complication centerpiece of the line. The tourbillon carriage, movement finishing, and provenance documentation are the primary authentication anchors.
| dial | Dial construction and tourbillon aperture | Tourbillon aperture is positioned at 6 o'clock with clean, polished edges; dial text and numeral quality consistent with UJ standards | Aperture edges that are rough or irregular; dial text quality below the standard of other UJ dials |
| case | Case metal and hallmarks | Platinum or gold with correct purity marks; 42mm case diameter; appropriately heavy for declared metal | Missing hallmarks; weight inconsistent with declared metal |
|
