UR-105 TTH Tantalum Hull

Reference: UR-105 TTH
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Limited Edition: 12 pieces
Case: soap bar-style case in tantalum and titanium, with a slider that opens the hinged bezel to reveal the movement below
Size: 53 x 39.5mm
Movement: automatic-winding manufacture caliber UR 5.03 
Function: wandering hours, retrograde minutes, digital seconds, power reserve
Power Reserve: approximately 48 hours
Water Resistance: 30m
Dial: openworked
Hands: luminous indications
Caseback: two sapphire crystal windows highlight twin-turbine winding regulators 
Strap/Bracelet: black rubber

Originally purchased in 2020, this UR-105 TTH is part of a 12-piece limited series originally released by Urwerk. The watch is in excellent overall condition and comes as a full set with its original box and papers. Goldsmith & Complications guarantees the watch’s authenticity. All of our pre-owned watches are covered by the manufacturer’s warranty. Learn more about our pre-owned watches.


Urwerk’s UR-105 TTH is the last edition of the UR-105 CT and concludes the 105 collection in style. A limited edition of just 12 pieces, 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.

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. A power reserve indication and digital seconds complete the information on the dial. The digital seconds displaying the seconds in 10-second increments is particularly remarkable.

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.