Urwerk Caliber Ur 9 01

Urwerk Caliber UR-9.01

Urwerk Caliber Ur 9 01

Brand Urwerk
Caliber Number UR-9.01
Movement Type Automatic, self-winding
In-House Yes
Jewels 46
Total Parts Unknown (please add to comments below)
Power Reserve 39 hours
Vibrations Per Hour 28,800 (4Hz)
Hacking Yes
Hand-Windable? Yes
Balance Monometallic
Balance Spring
Escapement Swiss Lever
Features Hours, minutes, small seconds, day/night indicator, oil change indicator
Country of Manufacture Switzerland
Known Models Urwerk UR-110

The Urwerk caliber UR-9.01 is an automatic movement designed in-house by Urwerk Geneve. This movement is found in the Urwerk model UR-110.

Materials and Finish

The materials that make up the caliber UR-9.01 are a brass baseplate and satellite system, as well as ARCAP alloy for the central satellite. ARCAP alloys can contain nickel, copper, cobalt, tin, lead and zinc, but do not have iron so they are anti-magnetic.

The movement features circular graining finish, diamond polishing, chamfered screw heads and polished screw heads.

Unique Indication

The movement tells time via a revolving satellite complication with wandering hour modules mounted on planetary gears. There is a small seconds dial, day night indicator, as well as an “oil change” indicator which notifies the wearer that it is time for an overhaul.

About the Oil Change Indicator in Urwerk’s own words:

“The “Oil Change” indicator alerts the user when a service is due after three years, with the dial changing from white (years one to three) to red (years three to five). This counter is reset to zero when the timepiece is serviced.”

Extra Info

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