Family: UN-6xx53 jewels80h power reserve21,600 vph (3 Hz)
The Ulysse Nardin UN-631 is a manual winding caliber with an analog display, 53 jewels, a power reserve of 80 hours and a frequency of 21,600 vph (3 Hz). It measures 37 mm in diameter. It belongs to the UN-6xx caliber family. It launched in 2019. It is in production. It is an in-house caliber of Ulysse Nardin.
Last updated 24 Oct 2026Suggest a correction
TECHNICAL SPECIFICATIONS
Movement Type
Manual Winding
Jewel Count
53 jewels
Power Reserve
80h
Frequency
21,600 vph (3 Hz)
Diameter
37mm
Display Type
Analog
Winding
Manual
QUICK FACTS
BRAND
TYPE
Manual WindingSTATUS
In ProductionMANUFACTURE
In-houseLAUNCH YEAR
2019CALIBER FAMILY
UN-6xxALSO KNOWN AS
cal. un-631
FOR WATCH DEALERS
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