URWERK UR-110 TTH & UR-110 ST

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Swiss haute horlogerie brand URWERK enhances its UR-110 collection with two new stunning models: UR-110 TTH – with a super strong Tantalum hull – and the UR-110 ST – with a distinctively grooved AlTiN bezel.

The UR-110 TTH is an imposing and robust timepiece that derives its strength from its bezel crafted in tantalum, a particularly hard and dense metal, well known for resistance to corrosion and for its bio-inertness. The TTH stands for “Tantalum Hull”. The sapphire crystal of the UR-110 TTH has also been upgraded.

The armoured bezel of the UR-110 TTH boasts a thickness of 4.10mm (as opposed to 2.40mm on other UR-110 models). This huge piece, attached to the titanium case by six screws, gives it a battle-hardened character reinforced by the bluish-gray tint of the natural tantalum. Another feature with quasi-military overtones is the registration number etched on the sapphire crystal of the UR-110 TTH at 8 o’clock. Tantalum is a rare metal of which the name comes from Tantalus, a Greek mythological figure synonymous with temptation. In UR-110 ST model URWERK placed a distinctively grooved AlTiN bezel.

Having won the 2011 Grand Prix de Genève prize for Best Design Watch, the UR-110 is at the forefront of watchmaking excellence, continuing URWERK’s radical tradition of telling the time using orbiting satellite complications.

In the UR-110 TTH and the UR-110 ST, the time is always shown on the right side of the watch. Three hour satellites follow a vertically arced line, graded from 0 to 60 minutes, in a downward motion. Planetary gearing keeps the satellites and their arrow-shaped “torpedoes” in parallel formation as they take turns to indicate the time as they pass the 60-minute track. This performance is made possible by means of an architecture featuring three levels of complexity:

– A central carousel providing the complication with stability and equilibrium
– Planetary gearing assuring the parallel rotation of the three hour satellites as they orbit the dial
– The three counter-rotating hour modules – each comprising an hour satellite, minute hand and counter balance – are each mounted on a planetary gear. These three modules are in constant counter-rotation to counter the direction of rotation of the central carousel.

The ingenuity of the layout lies in allowing the wearer to view the time discreetly and elegantly without the need to pull a cuff or sleeve back.

The UR-110’s technology can be appreciated through the large panoramic sapphire crystal. As well as indicating the hours and minutes, the UR-110 also features a Control Board on the dial side with indicators for “Day/Night” and “Oil Change” – URWERK’s service interval display – as well as small seconds on a sub dial. Turning the watch over, the titanium back encloses the innovative automatic winding system regulated by dual turbines.

Technical details
Cases
Case in Grade 5 titanium with AlTiN-treated steel bezel for the UR-110 ST;
Case in Grade 5 titanium with tantalum bezel for the UR-110 TTH;
Two position crown with integrated protection
Water resistance: 3 ATM

Movement
Calibre: UR 9.01 mechanical, automatic winding
Balance:Monometallic
Frequency: 28,800v/h, 4Hz
Jewels: 46
Balance spring:Flat
Power: Single barrel
Power reserve:39 hours
Winding system: Uni-directional rotor regulated by double turbines

Indications
Satellite complication with rotating hour/minute modules mounted on planetary gears
Control Board: “Day/Night” indicator; “Oil Change” alerting service intervals and small seconds