
Come aboard a flagship of inventive watchmaking with visible, elegant mechanics that feature a play on movement, combining technical versatility and the raw emotion of the ocean waves.

Caliber UN-631
Manual-winding
Classic or unconventional, simple or complex, for men or women, our collection of calibers is one of the most extensive and diverse in the industry. It is based on a culture of innovation, independence and quality that has made Ulysse Nardin one of the most advanced brands in creative watchmaking.
A complex composition
- Number of parts: 504
- Number of jewels: 53
- Total diameter (mm): 37
Impressive precision & longevity
- Frequency (Hz): 3
- Frequency (vph): 21600
- Power Reserve (H): 80
- Functions: Hours and minutes. Power reserve with anchor and windlass linked to the winding mechanism. Moon phase indication. Indicator of tidal coefficients and volumes. Flying tourbillon.
- Escapement: Steel / ruby












