DE BETHUNE x URWERK for Only Watch 2019

In support of the Only Watch biennial charity auction of unique timekeepers, two great independent watchmaking “Maisons” – De Bethune and Urwerk – joined their creative energies in bringing forth a timepiece that arouses curiosity, focuses attention and touches the senses.

DE BETHUNE x URWERK Moon Satellite for Only Watch 2019

From the outside, a case that challenges established norms, fusing the design and function genetics of De Bethune and Urwerk with its floating lugs and the singular vibrancy of mirror polished titanium.

DE BETHUNE x URWERK Moon Satellite for Only Watch 2019

Under the hood and curved sapphire crystal, a mechanical universe which amazes us with the one-off URDB01 caliber jointly developed for this very special auction – the crown at 12 o’clock, spherical moon phase, and Urwerk’s signature time indication with the now-famous satellite window in an arc that evokes the sun’s curvature.

DE BETHUNE x URWERK Moon Satellite for Only Watch 2019

This DE BETHUNE x URWERK collaboration is the story of four personalities, Denis Flageollet and Pierre Jacques at De Bethune, and Felix Baumgartner and Martin Frei at Urwerk.

Technical details

Model: DE BETHUNE x URWERK Moon Satellite for Only Watch 2019
Reference OW19

Functions
Wandering hour satellite, Minutes, Spherical moon phase indication at 6 o’clock, Power reserve situated on the back

Movement
Calibre DB2105
Type: Mechanical hand-wound movement
Adjustment: Winding, setting the time and spherical moon phase adjustment by means of the crown (3 positions)
Number of parts: 336
Jewelling: 37 jewels
Diameter: 30 mm
Power reserve: 4 days, ensured by a self-regulating twin barrel – De Bethune Innovation (2004)
Frequency: 28,800 vibrations per hour
Concave plate covers and mirror-polished barrels bridge
Open worked and hand sailed barrels
Steel parts beveled and polished by hand

Specificities
Hour satellite indication designed by URWERK with triple base plate in ARCAAP; satellite in aluminum mounted on Geneva crosses in beryllium bronze. Hand painted SuperLuminova index.
Titanium balance wheel with white gold inserts, optimised for temperature differences and air penetration – De Bethune Patent (2016)
“De Bethune” balance-spring with flat terminal curve – De Bethune Patent (2006)
Silicon escape wheel
Spherical moon phase indication accurate to a degree of one lunar day every 122 years –De Bethune Patent (2004)
Triple pare-chute shock-absorbing system – De Bethune Innovation (2005)

Case
Material: Polished grade 5 titanium
Case width: 43 mm
Case thickness: 13.3 mm
Lugs: Short or long floating lugs in polished grade 5 titanium – De Bethune Patent (2006)
Crystal: In sapphire crystal (1800 Vickers hardness) with double anti-reflective coating
Case back: Screwed case back in grade 5 polished titanium; Sapphire crystal (1800 Vickers hardness) with double anti-reflective coating
Water resistance: 3 ATM

Strap
Extra-supple alligator leather, alligator lining
Buckle: Pin buckle in polished grade 5 titanium

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