Urwerk - UR-101 Diamond Sky
There is a particular magic to the night sky: the way stars don't merely exist but guide, fixed points in an infinite expanse that have oriented travelers for millennia. The UR-101 Diamond Sky captures this sensation and wraps it around your wrist—not as metaphor, but as mechanical reality.
This is URWERK doing what URWERK does best: making time tangible, spatial, almost astronomical. The wandering hours—those signature satellite discs that have defined the brand since 1997—sweep across a 180-degree arc beneath a canopy of 214 diamonds. But these aren't gems applied as afterthought. They're integrated into a geometric constellation mechanically engraved into the steel case, each diamond sitting at the intersection of triangular motifs like a fixed star in a mechanical firmament.
The effect is disorienting in the best way. Glance down and you don't read the time so much as witness it: an hour numeral gliding from left to right, from sunrise to sunset, while diamonds catch and scatter light with every wrist movement. The steel case—41mm of architectural confidence—provides the necessary gravity, its polished surfaces and angular lugs creating contrast against the depth of the engraving. Crown at 12 o'clock, as URWERK insists. Always.
What separates the Diamond Sky from conventional high jewelry is intention. Martin Frei, URWERK's artistic director, speaks of the hexagonal arrangement following "a clear principle": stars in nature witness physical laws; on this dial, they create balance, connecting top to bottom, translating vision into harmony. The result isn't decorative but structural—light becomes language, scattering and reflecting, while the mechanics remain relentless, accurate, legible.
The strap surprises: textured white rubber with calfskin lining, paired with a steel pin buckle. Practical luxury. The caseback reveals URWERK's industrial poetry—"PUSH CROWN" engraved above the limited edition marking, 25 pieces total, Swiss 316L steel, the UR-1.01V caliber beating inside with its 48-hour autonomy.
Technical specifications
MOVEMENT
Calibre: In-house automatic winding
Jewels: 37
Frequency: 28,800 vph (4 Hz)
Power Reserve: 48 hours
Materials: ARCAP P40 alloy for the carousel and satellites; aluminum for the baseplate
Finishes: Circular graining, sandblasting, circular and straight satin-finishing; chamfered screw heads
INDICATIONS
Wandering hours displayed on two rotating satellites. Minutes indicated via a fixed scale. Hours and minutes markers painted with Super-LumiNova® for low-light legibility.
CASE
Materials: Stainless steel case set with 214 D-E-F color, VVS+ clarity responsibly sourced diamonds, totaling 1.63 carats
Size: 41 mm diameter x 9.33 mm thick
Glass: Glareproofed, metallised sapphire crystal
Water Resistance: Pressure-tested to 30 meters / 3 ATM
STRAP
Material: Textured white rubber with black calfskin lining
Buckle: Steel pin buckle
Limited edition: 25 pieces
Price: HKD $850,000