Urwerk UR-112 Aggregat Back to Black

UR-112 Back to Black – URWERK takes time for a walk on the dark side

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If I were a hero? I’d be a James Bond-like badass.
If I were a colour? I would be the darkest night.
If I were a quality? Punctuality, of course, it’s the only rule I abide by.
If I were a car? I would be the supremely desirable Bugatti Atlantic Type 57 SC.

I am the UR-112 Aggregat Back to Black. I am the most digital of all URWERK mechanical timepieces.
I am a jumping hour, dragging minute and digital second watch.
I am all that and so much more…

Urwerk UR-112 Aggregat Back to Black

I’m a superb mechanism in a steel and titanium body.

The UR-112 Aggregat Back to black comes in a steel and titanium body with a complex architecture. Let’s start with its upper part. Its steel bonnet is grooved and openworked. It gives a glimpse of the richness of this gleaming speed machine. This cover opens vertically to give access to the secondary power reserve and digital seconds indications. Its central titanium body is satin-brushed, sandblasted and bead-blasted, thereby forming a field of functional microdots. The two blackened steel wings of the UR-112 Aggregat Back to black fit into this central body. Each zone, each space, each element has its own texture, its own finish, its own language.

Urwerk UR-112 Aggregat Back to Black

I was born amid the smell of petrol and polish.”

The UR-112 Aggregat Back to Black belongs to the Special Project line. This is a departure from the founding concept of URWERK‘s wandering-hour indication, on a whole new scale, with new volumes for the UR-122 Aggregat and its UR-13.01 calibre. Martin Frei, co-founder of URWERK said: “The inspiration for the 112 lines came straight from the USA. Felix and I were lucky enough to discover the impressive car collection of Mr Ralph Lauren. Amongst the rarest models was the Bugatti Atlantic. WOW! It was love at first sight. Its perfect lines, its spine running along its body, its Art Déco features. This Bugatti is a true wonder!  It was the muse that inspired my first drawings of the UR-112.

  • Urwerk UR-112 Aggregat Back to Black
  • Urwerk UR-112 Aggregat Back to Black
  • Urwerk UR-112 Aggregat Back to Black
  • Urwerk UR-112 Aggregat Back to Black

There are no cubes, no carousel with satellites, no 120-degree sector-type indication like on so many models that have marked the history of URWERK over the last 25 years. The UR-112 Aggregat Back to Black displays jumping hours and trailing minutes on prisms. Shifted to the front of the watch, they’re visible in their large sapphire crystal housings. As the hours jump on one side and the minutes advance in five-minute increments on the other, an additional trailing indicator shows the accurate minutes. Felix Baumgartner, co-founder of URWERK and master watchmaker said: “Once again we’ve let our guts speak for us in making a spaceship, a UFO that is a technical challenge. This UR-112 is pure madness in terms of the mechanics and the finishes. The energy generated by the UR-112’s central engine is being distributed in four directions along no less than 12 axes. It’s actual mechanical lace. We will only be able to make a very limited number of them, but this is sheer, unadulterated watchmaking pleasure!”

Urwerk UR-112 Aggregat Back to Black

I am a watchmaking fantasy driven to the extreme“.

The central body of the case contains the driving and regulating components of the UR-13.01 calibre. A large barrel providing 48 hours of power reserve is coupled with an automatic-winding rotor. Pressing the two pushers on the sides of the watch opens the cover and reveals the power-reserve indicator and the spectacular small seconds. The latter is composed of a skeletonized silicon disk attached to a red anodized aluminium bridge, a typical URWERK design feature.

A transmission shaft stands out in the middle of this incredible mechanism. Measuring several centimetres in length, it’s possibly the longest component in contemporary watchmaking. To guarantee its lightness and rigidity, it’s made of titanium and ensures the coupling with the display module, located at the front of the shell. It establishes this link thanks to a new succession of gears that drive the hours and minutes prisms via two 90° bevel gears. The black aluminium prisms featuring grooved sides are enhanced with Super-LumiNova and secured by planetary systems that ensure they rotate both on their axis and in space. This kinematic approach calls for absolute precision and contributes to endowing the UR-112 Aggregat Back to black with a totally unique and unconventional design. So URWERK!

  • Urwerk UR-112 Aggregat Back to Black
  • Urwerk UR-112 Aggregat Back to Black

Urwerk UR-112 Aggregat Back to Black Technical Specifications

Ref. UR-112 Aggregat Back to black – 25-piece limited edition, Price: CHF 280,000 (excluding tax)


  • Calibre UR-13.01 automatic
  • Jewels: 66
  • Escapement: Swiss lever-type
  • Frequency: 4 Hz; 28,800 vph
  • Power reserve: 48 hours
  • Materials Aluminum hours and minutes satellite prisms; titanium transmission shaft, silicon seconds wheel
  • Surface finishing: Circular-graining, sandblasting, Côtes de Genève, polished screw heads


  • Jumping digital hours and trailing digital minutes on satellite prisms; digital seconds; power-reserve indicator


  • Dimensions: Width 42 mm; length 51 mm; thickness 16 mm
  • Materials DLC treated titanium and steel
  • Glass Sapphire crystal
  • Water resistance Pressure tested to 3 ATM / 100 ft / 30 m

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