New Releases · 2026-07-10
Urban Jürgensen UJ-1 combines a flying tourbillon with a one-second remontoir
The anniversary watch translates ideas from Derek Pratt’s Oval pocket watch into a compact, hand-finished wristwatch.
By Chronolume digest · Original English summary · Based on MONOCHROME Watches; official manufacturer specifications
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What to know
The UJ-1 draws its mechanical structure from Derek Pratt’s Oval pocket watch. Its flying tourbillon incorporates a remontoir that replenishes the escapement’s energy once each second, producing a dead-beat seconds display. A separate cone-and-feeler mechanism drives the fractional power-reserve indication at noon.
The hand-wound calibre offers 47 hours of reserve and is housed in a 39.5 mm case, 12.2 mm thick. Hand-guilloché dial surfaces and open-tipped hands give the front a traditional framework around the unusual mechanics. Urban Jürgensen offers platinum with light or grey dials and rose gold with a light dial, limited to 25 per reference. The listed price is CHF368,000 excluding VAT.
At a glance
| Model | UJ-1 Tourbillon 250th Anniversary |
|---|---|
| Case | 39.5 × 12.2 mm; platinum 950 or 5N rose gold |
| Movement | UJ-1 hand-wound flying tourbillon with remontoir |
| Power reserve | 47 hours |
| Frequency | 18,000 vph |
| Functions | Hours, minutes, dead-beat small seconds; fractional power reserve |
| Water resistance | 30 m |
| Edition | 75 total; 25 per reference |
| Price | CHF368,000 excluding VAT |
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Source & attribution
MONOCHROME Watches; official manufacturer specifications · Published 2026-07-10 ↗