• Sapphire Crystal
  • Ref. 539.506.ZG.A
  • Limited to 10 pieces


The project took shape from the observation that the wristwatch is rather placed, for most of its time, in the horizontal position and the tourbillon mechanism produces its effect of compensating gravity when it’s in the vertical position. The collaboration and discussions with the designer Benjamin Müller led us to put the tourbillon on the vertical position and to place it in the centre of the dial. The feeling to work in the right direction was immediately reinforced by the first sketches, the balance and the elegance of the whole. To celebrate the 10th anniversary of the founding of Cyrus, we decided to further enhance the beauty of this surprising mechanism, using the sapphire crystal for the case.
Jean-François Mojon
Master Watchmaker

About the Klepcys Vertical Skeleton Tourbillon Sapphire

Cyrus Genève celebrates its 10th anniversary with a limited series of 10 pieces of the KLEPCYS VERTICAL SKELETON TOURBILLON SAPPHIRE.

Designed by master-watchmaker Jean-François Mojon, the brilliant creative mind behind all Cyrus creations, the first edition of the Klepcys Vertical Tourbillon was released in 2018 and showcases an outstandingly innovative manual winding movement driving the watch. The tourbillon cage, placed in the middle of the dial for the first time, is set on a vertical axis at a 90° angle. Painstaking studies by the technical team at CYRUS revealed that this angle ensures the tourbillon cage is almost always in vertical position when on the wrist, thereby optimising its performance in precision. 

To further enhance the beauty of this surprising mechanism, Cyrus Genève chooses a unique 3-D open-worked architecture for its dial and adopts, for the first time, a transparent sapphire crystal case which allows a complete view of the movement from all angles and let watch enthustiasts and collectors appreciate all its stunning details.

Composed of a total of 29 parts, the style of the 44 mm case, excluding the functional   twin-crowns, has been redesigned to hide a maximum of fasteners, screws and steel elements. Some recessed edges have been slightly rounded to make machining and polishing possible without compromising on design and the strong character of this watch.

  • Material Sapphire crystal
  • Diameter 44 mm (excluding crowns)
  • Thickness 19.9 mm
  • Crown at 3 o’clock

    In position 1, it winds the movement

    In position 2, it adjusts the time

  • Crown at 9 o’clock

    Hour-increment by pressing the push-button

  • Glass Anti-reflective sapphire crystal glass on dial and case back
  • Case back Case back with engraved inscription “10 years CYRUS - Est. 2010”
  • Water-resistance 3 ATM (30 m - 100 ft)
  • Material White rubber strap with embossed prism pattern
  • Clasp 18K 4N gold folding buckle customized with the CYRUS logo
  • Open-worked dial with two parallel barrels at the top, rhodium plated with engraved triangle motif, rhodium-plated wheels with cerclage decoration, mirror-polished cams

    Central tourbillon bridge comprising two arches in 18K 4N gold, beveled and polished edges 

    Sweeping retrograde minute and retrograde hour arches  with microbeaded finish, white Arabic numerals and indices

    Hour/minute hands:  exclusive Cyrus desing, open-worked,  4N gold plated, luminescent tips

    5 mm  power reserve sphere with black DLC microbeaded finish

  •       Retrograde jumping hours

     Sweeping retrograde minutes

     Seconds on tourbillon cage

     Power reserve 




  • Calibre In-house manufactured hand-winding movement, calibre CYR625
  • Number of components 344
  • Number of jewels 51
  • Frequency 3hZ
  • Vibrations per hour 21.600
  • Escapement Swiss pallet fork escapement
  • Balance Wheel Variable-inertia balance wheel
  • Winding Barrels Two parallel barrels with black lacquered ratchet-wheels and Cyrus logo
  • Power reserve 100-hour
  • Bridges Slightly curved sunray pattern, polished and opaque, sandblasted effect, grey NAC galvanic treatment on the surfaces.
Tourbillon cage
  • Material Steel
  • Number of parts 52
  • Weight 0.706 g
  • Central tourbillon Central tourbillon on vertical axis at a 90° angle
  • Rotation Complete rotation in 1 minute

Master Watchmaker

Master watchmaker, Jean-François Mojon, is one of today’s best-known and most courted in the craft. Honored at the Grand Prix de la Haute Horlogerie of Geneva in 2010 as “best independent master watchmaker”, Jean-François is the mastermind behind all CYRUS creations.

Jean-François Mojon

Jean-François Mojon

Klepcys Vertical Skeleton Tourbillon Sapphire

Limited to 10 pieces

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