Oris Caliber 641
Oris Caliber 641

Oris Caliber 641

Brand Oris
Caliber Number 641
In-House?
No
Base Caliber
ETA 2836-2
Movement Type Automatic, self-winding mechanical
Chronometer?
Yes
COSC?
Yes
Lignes 11.5”’
Diameter
26mm
Casing Diameter
25.6mm
Height
5.05mm (unconfirmed)
Jewel Count
27
Beat Rate
28,800 vph, 4Hz
Lift Angle
50 degrees
Power Reserve
~38 hours
Rotor Style
Ball-bearing
Rotor Winding Direction
Bi-directional
Hand-Windable?
Yes
Anti-Shock Device
Incabloc
Balance
Glucydur
Hand Count 4
Functions Central hours; central minutes; small seconds at 9:00; central pointer date hand
Hacking Seconds?
Yes
Country of Manufacture Switzerland, Swiss made
Known Models
Oris Classic Pointer Date (Add your watch to the comments below…)

The Oris caliber 641 is the COSC version of the Oris 644. Learn more here.

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