The UR-210 by URWERK is well known among watch connoisseurs for its orbital complication and imposing retrograde minute hand. Now the young Swiss watch brand adds an 'S' version of UR-210 in a limited edition of just 35 pieces. Dedicated to the aficionados of avant-garde horology, this new version offers even stronger monochrome aesthetic with its full metal bracelet, which was developed specifically for URWERK.
• A central axis set in ruby bearings provides excellent stability for the satellite/retrograde complication. A cylindrical marine chronometer type spring runs vertically around the axis and generates the optimal tension required for the retrograde minutes flyback.
• A minute hand, which also forms a frame for the hour satellites, displays the time in an extraordinary way. Milled from aluminum to exacting tolerances of approximately 3 microns, the whole structure has a total weight of just 0.302g and is counter balanced by a brass weight. This three-dimensional cage offers rigidity as it transfers energy from the cylindrical flyback spring in the top center of the carrousel to the double-star gear underneath.
• A double coaxial star-shaped cam regulates the retrograde mechanism through its gearing and its rotation defines the trajectory of the minute hand. When the minute hand reaches 60, the double star trips a (one of three) hockey stick shaped spring under the mechanism, which liberates the minute to fly back to the next hour satellite at 0-minutes.
Model: UR-210S “Full Metal Jacket”
Material: Titanium and steel
Dimensions: Width 43.8mm, length 53.6mm, thickness 17.8mm
Glasses: Sapphire crystal
Water resistance: 30m/100’/3ATM
Escapement: Swiss lever
Frequency: 28,800v/h, 4Hz
Balance spring: Flat
Power source: Single mainspring barrel
Power reserve: 39 hours
Winding system: Self-winding coupled to turbines
Plate in ARCAP P40 rhodium coated; 3D minute hand in aluminum with brass counterweight; central cylindrical spiral in spring-steel; hour satellites in aluminum; central carrousel and screws in Titanium Grade 5
Circular graining, sandblasted, circular and straight satin-finished plate; satin-finished and diamond-polished satellites; beveled and polished screw heads
Patented revolving satellite complication with wandering hour and three-dimensional retrograde minute hand; power reserve indicator; patented winding efficiency indicator
Super-LumiNova treatment on markers, dials, indexes, hands, and satellites
Two-position winding crown with crown protector
On the back: winding efficiency selector
Satin finish; bead-blasted metal bracelet with deployment clasp developed by Maspoli for URWERK
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