UR-112 Aggregat by URWERK

The UR-112 Aggregat by URWERK – To the third dimension and beyond

Reading Time: 3 minutes

The UR-112 Aggregat is the latest addition to URWERK’s Special Project collection, a laboratory offering horological freedom and follies encouraged. URWERK co-founders Felix Baumgartner, master watchmaker, and Martin Frei, artistic director and designer, started this new adventure from a blank page. And a sketchbook overflowing with ideas.
The UR-112 Aggregat was inspired by a dream of a new mechanical challenge. Technicality has the centre stage. The beauty of the UR-112 lies in the complexity of its gears and near-manic assembly precision.
The UR-112 Aggregat heralds the genesis of a watchmaking tour de force.

Aggregat is a compendium of 25.5 grams of distilled technique, offering fully digital time displays, from hours down to seconds. A double or nothing challenge for the watchmaker who is betting with microns.

UR-112 Aggregat by URWERK

Starting with the hour and the minutes, each are displayed on triangular prisms operating under transparent cylinders, which appear as levitating mechanisms to be admired through the crystal.

UR-112 Aggregat by URWERK

On the left, the digital hour display. Each of the 12 numerals is engraved then filled with Super-LumiNova. The transcription of time takes the form of a sign display switching sharply to a chronometric rhythm.

UR-112 Aggregat by URWERK

On the right, the same system displays the minutes. Minutes free from the strain of the singular and instead jump in 5-minute increments.

UR-112 Aggregat by URWERK

The operation of the jumping hours display is driven by the advance of the minutes. At the 60th minute, the force accumulated during those last 3600 seconds is released to change the time to the next hour.

UR-112 Aggregat by URWERK

But the primary source of all this power is rooted in the basic movement opposite this Dantesque construction. A long, thin rod connects the body and head of the URWERK UR-112. This is the cardan shaft, a central part of vital importance to this mechanism. A complex set of cogs, a succession of gears, allows this axis to transmit all the energy required. And this despite a 90 ° turnaround. This transmission shaft with double gearing – one at each end – is perpendicular to the horizontal time indication.

UR-112 Aggregat by URWERK

We nicknamed this watch the Aggregat because the UR-112 brings different elements together. From a single source of energy, we power all displays and mechanisms of this UR-112. This force is distributed sparingly, some even “recycled” so that from the digital second at the top of the dial to the dragging minutes and the jumping hours at the opposite extreme, each display receives precisely its required dose of energy with none wasted,” explains Felix Baumgartner.

UR-112 Aggregat by URWERK

The movement of the URWERK UR-112 nestles inside a hunter case with a hinged titanium protective cover. Pressing the pushers on either side of the case unlocks the cover and it springs up, revealing an elaborate display of digital seconds. Etched on tiny silicon wafer disks, tiny numerals parade under a magnifying lens beside the only analogue display of the UR-112, a 48-hour power-reserve indicator.

UR-112 Aggregat by URWERK

This first edition URWERK UR-112 Aggregat is limited to 25 pieces with a matte finish. It has sober colours, an anthracite body with black sides complemented by a cover in the same colour. Beautiful and elegant. “The sources of inspiration for this UR-112 are many and diffuse. The grille of the Bugatti Atlantique is the most obvious. An exceptional automobile whose contrasting spine emphasizes absolute symmetry. Some Middle Eastern influences are also vivid in my mind. The memories, the smells, the experiences during my travels nourish my imagination and are found in all my creations. Found by subtle touch.” says Martin Frei.

UR-112 Aggregat by URWERK

Be seduced by the nobility of URWERK UR-112 Aggregat’s refined body, it contains the most beautiful of secrets.

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UR-112 Aggregat by URWERK Technical Specifications

UR-112 Aggregat – bicolore edition, 25 pieces limited edition


  • Calibre UR-13.01
  • Jewels: 66
  • Escapement: Swiss Lever-type
  • Spring: Flat hairspring
  • Frequency: 4Hz; 28´800 vph
  • Power reserve: 48 hours
  • Winding system: Automatic
  • Materials: Triangular hour and minute prisms in Beryllium copper; 8 planetary gears in titanium; Silicium second disk.
  • Surface finishes: Circular and straight graining, sanding, côtes de Genève, polished screw heads

Indications :

  • Jumping digital hour on triangular satellite prisms;
  • running digital minute on triangular satellite prisms;
  • digital seconds; power reserve


  • Dimensions Width 42 mm x length 51 mm x thickness 16 mm
  • Water resistance: Pressure tested to 3ATM / 100ft / 30m
  • Crystal: Sapphire crystals


  • 250’000.00 CHF (Swiss francs // tax not included)

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