A one-off signed DE BETHUNE x URWERK Moon Satellite for Only Watch 2019

Expressing the perfection ofthe celestial order, this unique timepiece is a complex interaction of mechanismsspecific to De Bethune and Urwerk – a true fusion of their watchmaking genes.

DE BETHUNE x URWERK Moon Satellite For Only Watch 2019
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Remember when we announced the collaboration between Urwerk and De Bethune Moon Satellite for Only Watch Charity Auction? We have now the first pictures of the timepiece. Check below the latest press release and technical specifications.

DE BETHUNE x URWERK Moon Satellite For Only Watch 2019

United we are stronger in the fight against disease. 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. 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. 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

The collaboration

DE BETHUNE x URWERK is the story of four personalities, Denis Flageollet and Pierre Jacques at De Bethune, and Felix Baumgartner and Martin Frei at Urwerk. A story of mutual respect and implicit trust. The meeting of two ultra-creative and independent watchmaking minds, linked by a longstanding friendship, to donate for auction a truly original and highly desirable timepiece in support of the fight against Duchenne muscular dystrophy. 1 + 1 = 3.

DE BETHUNE x URWERK Moon Satellite For Only Watch 2019

DE BETHUNE x URWERK Moon Satellite For Only Watch 2019 Technical specifications


  • Moon Satellite for Only Watch 2019


  • OW19


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


  • DB2105


  • Mechanical hand-wound movement


  • Winding, setting the time and spherical moon phase adjustment by means of the crown (3 positions)

 Technical features of calibre DBUR2105

Number of parts:  

  • 336


  • 37 jewels


  • 30 mm

Power reserve:

  • 4 days, ensured by a self-regulating twin barrel – De Bethune Innovation (2004)


  • 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)
  • Tiple pare-chute shock-absorbing system – De Bethune Innovation (2005)


  • 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

Case and strap

Case material: 

  • Polished grade 5 titanium

Case width:

  • 43 mm

Case thickness: 

  • 13.3 mm


  • Short or long floating lugs in polished grade 5 titanium – De Bethune Patent (2006)


  • 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


  • Extra-supple alligator leather, alligator lining


  • Pin buckle in polished grade 5 titanium

DE BETHUNE x URWERK Moon Satellite For Only Watch 2019 Gallery

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