Specification
Case
- Diameter
- 44 mm
- Height
- 16.54 mm overall; 12.2 mm "perceived thickness" (Monochrome)
- Material
- white gold
- Crown
- none; the bezel sets the time, winding through the open caseback
- Water Resistance
- 30 m
Movement
- Calibre
- UN-252
- Type
- manufacture automatic, Grinder winding system; two inclined flying tourbillons on the minute bridge, combined by a vertical differential
- Functions
- hours, minutes, seconds (cylindrical seconds display driven through a gimbal)
- Power Reserve
- 72 hours
- Frequency
- 2 × 2.5 Hz (2 × 18,000 vph)
- Components
- 511 parts
- Escapement
- DIAMonSIL escapements; silicon balance wheels and hairsprings
- Notable
- 5 mm vertical differential of 69 parts with eight ceramic ball bearings, described by Ulysse Nardin as the world's smallest; 11-component gimbal measuring 4.8 mm; tourbillons inclined at ten degrees, one turn in sixty seconds, rotating in opposite directions; more than 70 per cent of the components hand-finished (Monochrome)
Details
- Dial
- no conventional dial; transparent blue Nanosital hour disc with white Super-LumiNova markers, seven planes under the crystal (Monochrome)
- Straps
- grey ballistic rubber strap with white stitching, white-gold deployant buckle
Price
- Retail
- CHF 320,000 / €348,100 / $361,600, as of Apr 2026 (prices reported by Monochrome, 14 April 2026; USD excl. VAT)
