Stay on top of all watchmaking news ! OK

This search is sponsored by Girard-Perregaux

Search in :
Urwerk - UR-105 Tantalum Hull

Urwerk UR-105 Tantalum Hull

The URWERK UR-105 Tantalum Hull marks the end of the 105 Collection

Time for the UR-105 CT is now running out. The new Tantalum Hull is the last edition of the UR-105 CT and ends the 105 collection in style. Presenting the UR-105 TTH.

The UR-105 Tantalum Hull

UR-105 TTH Tantalum Hull © Urwerk

“Tantalum is a very special metal. Its name comes from Tantalus, one of Greek mythology’s bad boys," co-founder Martin Frei discloses. "Tantalum is precious, rare, and extremely painful to machine and finish. We made an UR-110 out of tantalum a few years ago – a first that almost was the last. The team made me promise never to use it again because tantalum ‘eats’ our CNC machines’ bits. It destroys them, reducing their life by a factor of three. But I love its blue-gray luster. Pure magic!”

The UR-105 Tantalum Hull

UR-105 TTH Tantalum Hull © Urwerk

Fortunately, as so often with URWERK, desire won over reason. The UR-105 TTH is a limited edition of just 12 pieces. “Tantalum is a precious metal weighing approximately the same as platinum," confides Felix Baumgartner, co-founder of Urwerk. "It has a solid presence on the wrist. To machine it is a nightmare, but it has incomparable beauty. Tantalum is one of the most URWERK-ian metals I know of. It is dark, almost anthracite colored, a shade which is an integral part of URWERK’s aesthetic signature”

The UR-105 TTH – “TTH” stands for Tantalum Hull – is a beautiful object, substantial and pleasing to hold. Its distinctive octagonal form features deep streaks along its entire length. It is angular, geometric, and symmetrical with strong influence from the Art Deco style.

The UR-105 Tantalum Hull

UR-105 TTH Tantalum Hull © Urwerk

“The UR-105 TTH comes with a protective cover, a breastplate that protects the mechanism," Martin Frei explains. "Tantalum is a perfect protective shield against corrosion. Hence its name Tantalum Hull."

Activating the sliding “tongue” of the UR-105 TTH opens the hull to reveal its mechanics, featuring a satellite time indication built on a new skeleton carousel. The latter supports four hour satellites, each displaying three hour numerals that rotate in turn along the minute track, providing both analog and digital time displays.

The UR-105 Tantalum Hull

UR-105 TTH Tantalum Hull © Urwerk

A power reserve indication and digital seconds complete the information on the dial. The digital seconds displaying the seconds in ten-second increments is particularly remarkable. To make it as light and as ephemeral as possible, the seconds disk was made using the LIGA photolithography process and the marker is openworked. The total weight of the display is less than 0.10 grams.

On the back, two turbines regulate the movement’s automatic winding system, which can be easily adjusted using a small lever according to how active the wearer is. In the "FULL" position, the slightest movement of the wrist is enough to wind the mainspring. In “STOP” mode, the automatic winding system is deactivated and the UR-105 is manually wound. A third intermediate position, “RED” (for REDUCED), moderates winding to minimize excessive tension and wear.



Recommended reading

Watch Finder

Search by:

Find your watch >

The brand

Few brands are as closely associated with the rise of avant-garde independent horology in the new millennium than URWERK, the Geneva-based brand with Swiss-German mechanical foundations.

Find out more >

All the news >

Contact brand >

All the watches >