URWERK UR-210Y “Black Hawk”

The URWERK atelier welcomes their new model UR-210Y “Black Hawk”, an exceptional timepiece equipped with satellite complication display with wandering hour and retrograde minute indicators. Its innovative winding efficiency indicator – a world-first – reminds the wearer about the status of energy stored with automatic winding rotor.

The dial of the UR-210Y features a traditional power reserve indication at one o’clock. In a near mirror image at 11 o’clock we find a similar indication: a world-first complication that indicates winding efficiency over the last two hours.

Has your recent activity been enough to replenish your UR-210Y’s energy levels? If yes, the winding efficiency indicator will point emphatically to the green zone. If not, you have been using more energy than you are generating, and the winding efficiency indicator will point to the red zone.

Armed with knowledge of both winding efficiency and available power reserve, you are then able to intervene. If your UR-210Y indicates an insufficient supply of energy, you can position the winding efficiency selector at the back of the watch to “FULL”.

The rotor will then convert the slightest movement into stored energy. In this configuration, a turbine connected to the rotor provides smooth, unimpeded power. But if you are more active, then that may provide more power than required and unnecessarily wear the mechanism. In that case, you would position the winding efficiency selector to “REDUCED” to engage the rotor damping system. An air turbine compressor mounted on ruby bearings spins and creates internal resistance – enough friction to slow down or dampen the automatic winding rotor. In “STOP” mode, the automatic winding system is disabled completely and the UR-210Y runs off reserve power and may require manual winding.

Back to the dial side, the UR-210Y’s satellite complication with retrograde minute is both highly original and totally explosive. The principal feature is a high-tech, oversized, three-dimensional retrograde minute hand. Its function is to enclose the hour satellite and indicate the time as it transverses the 0-to-60-minute scale. This one-hour journey through time, tracing an arc of 120°, is smooth and fluid. But the true nature of the piece is revealed at the end of the 59th minute. Then a sharp distinct “click” signals the return of the minute hand to its starting point. In less than 0.1 of a second the hand flies back to dock with the next hour satellite.

This high-speed retrograde system is based on three key elements:

  • 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 minute’s flyback.
  • A minute hand, which also forms a frame for the hour satellites, displays the time in an extraordinary way. Milled from aluminium 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.

The UR-210Y “Black Hawk” is available in a limited edition of 75 pieces in titanium and AlTiN-treated steel.

Technical details
Case
Material: Titanium and AlTiN-treated steel
Dimensions: Width 43.8mm, length 53.6mm, thickness 17.8mm
Glasses: Sapphire crystal
Water resistance: 30m/100’/3ATM
Surface finishes: Satin finish; bead-blasted

Strap
Fabric

Movement
Caliber UR-7.10
Jewels: 51
Escapement: Swiss lever
Balance: Monometallic
Frequency: 28,800v/h, 4Hz
Balance spring: Flat
Power source: Single mainspring barrel
Power reserve: 39 hours
Winding system: Self-winding coupled to turbines

Materials: Plate in ARCAP P40; 3D minute hand in aluminium with brass counterweight; central cylindrical spiral in spring-steel; hour satellites in aluminum; central carrousel and screws in Titanium Grade 5

Surface finishes: Circular graining, sandblasted, circular and straight satin-finished plate;  satin-finished and diamond-polished satellites; beveled and polished  screw heads

Indications 
Patented revolving satellite complication with wandering hour and three-dimensional retrograde minute hand; power reserve indicator; winding efficiency indicator (patent pending)
Super-LumiNova treatment on markers, dials, indexes, hands, and satellites

Controls
Two-position winding crown
On the back: winding efficiency selector

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